Dapha Bum, Arunachal Pradesh: Height, Location & Facts

Dapha Bum

Morning Sunrise view of Arunachal Pradesh , northeast India | Loren Sonowal

🏔️ Overview

Dapha Bum is a remote mountain rising above the northern side of Namdapha National Park and Tiger Reserve in Arunachal Pradesh, northeastern India. The peak reaches approximately 4,571 to 4,578 metres (14,997 to 15,019 feet) above sea level, making it the highest point in Namdapha National Park and the highest mountain in Changlang district.

Dapha Bum stands within the Dapha Bum Range, a high east–west ridge commonly associated with the Mishmi Hills. Its slopes overlook one of the most biologically diverse and least accessible protected landscapes in India.

The mountain is notable for several reasons:

It is the highest point of Namdapha National Park.
It rises more than 4,000 vertical metres above the park’s lowest valleys.
It has approximately 1,610 metres of topographic prominence.
It qualifies as an ultra-prominent mountain.
It feeds streams belonging to the Namdapha and Noa-Dihing river system.
Its slopes support a transition from subtropical and temperate forests to subalpine and alpine environments.
It lies within an exceptionally remote wilderness near India’s borders with Myanmar and China.

Dapha Bum is sometimes described inaccurately as the highest peak in Arunachal Pradesh. It is not. That distinction belongs to much higher Himalayan summits in the northern part of the state, most notably Kangto, which rises to about 7,090 metres on the India–China border.

Dapha Bum is instead:

The highest point of Namdapha National Park and Changlang district, and one of the most prominent mountains in eastern Arunachal Pradesh.

The mountain has no established commercial climbing route, no developed base camp, and no regularly maintained trail to its summit. Much of the high interior of Namdapha remains extremely difficult to access, and reliable public information about summit attempts is limited.

Dapha Bum’s importance is therefore based less on conventional mountaineering and more on geography, hydrology, biodiversity, wilderness conservation, and the mountain’s commanding position above Namdapha.

Why is it called Dapha Bum?

The Government of Arunachal Pradesh explains that Dapha is the name of the hill, while bum means the peak or summit of a hill.

The name may be written in several ways:

Dapha Bum
Daphabum
Dapha Bum Peak
Dapha Bum Ridge
Dapha Bum Range

“Dapha Bum” is the clearest form when referring specifically to the mountain. “Dapha Bum Range” or “Dapha Bum Ridge” refers to the broader line of high mountains along the northern side of Namdapha.

Relationship to Namdapha

Namdapha National Park takes its name from the Namdapha River, which originates in the Dapha Bum area and flows into the Noa-Dihing river system.

The mountain is therefore closely connected with the name, geography, and drainage of the entire protected area.

Dapha Bum’s snow, rainfall, streams, and high mountain catchments feed water into the forests and valleys below. This connection between the summit and the river system is one reason the mountain is fundamental to understanding Namdapha’s landscape.

Is Dapha Bum part of the Himalayas?

Dapha Bum lies in a complicated transition zone where several major Asian mountain and biological regions meet.

It is usually associated with the Mishmi Hills, which form part of the northeastern mountain systems adjoining the Eastern Himalayas. The Patkai hills rise farther south and southeast along the India–Myanmar frontier.

Different geographical classification systems may place Dapha Bum within:

The Mishmi Hills
The Dapha Bum Range
The Eastern Himalayan region
The northeastern ranges of Arunachal Pradesh
The wider mountain system surrounding the parallel river gorges of southeastern Tibet and northern Myanmar

For readers, the simplest and most geographically useful description is:

Dapha Bum is the highest mountain of the Dapha Bum Range in the Mishmi Hills of eastern Arunachal Pradesh.

It should not be described as part of the Patkai Range itself. Namdapha lies between the Dapha Bum highlands to the north and the Patkai hills toward the south and southeast.

Readers can explore the broader continental setting in Mountains in Asia.

⚡ Fast Facts

Fact	Details
Continent	Asia
Country	India
State	Arunachal Pradesh
District	Changlang district
Protected area	Namdapha National Park and Tiger Reserve
Mountain range	Dapha Bum Range
Parent range	Mishmi Hills
Broader mountain region	Eastern Arunachal Pradesh and the Eastern Himalayan transition zone
Primary name	Dapha Bum
Alternative spelling	Daphabum
Official park elevation	Approximately 4,571 m (14,997 ft)
Topographic database elevation	Approximately 4,578 m (15,019 ft)
Prominence	Approximately 1,610 m (5,282 ft)
Isolation	Approximately 57 km (35.4 mi)
Key col elevation	Approximately 2,968 m (9,738 ft)
Parent peak	Gamlang Razi
Nearest higher neighbor	Gamlang Razi
Coordinates	Approximately 27.661° N, 96.700° E
Prominence classification	Ultra-prominent mountain
Highest-point status	Highest point in Namdapha National Park and Changlang district
Major river connection	Source region of the Namdapha River
Principal drainage	Noa-Dihing–Brahmaputra river system
Typical landscape	Forested ridges, steep valleys, high mountain slopes, alpine vegetation, snow and exposed rock
Documented public climbing route	None established
Civilian access	Extremely difficult and restricted by terrain, protected-area rules and remoteness

Why are different elevations reported?

Three figures frequently appear for Dapha Bum:

4,571 metres
4,578 metres
4,598 metres

Official descriptions of Namdapha National Park commonly use 4,571 metres, while modern topographic mountain databases list 4,578 metres. An Arunachal Pradesh tourism publication gives the slightly higher figure of 4,598 metres.

These differences may result from:

Different maps and surveys
Rounding
Variations in digital elevation models
Identification of slightly different points along the summit ridge
Typographical errors repeated between publications

For this profile, the most responsible presentation is:

Dapha Bum rises approximately 4,571–4,578 metres above sea level.

The figure of 4,571 metres is retained as the principal official protected-area elevation, while 4,578 metres is used for prominence and isolation calculations based on Peakbagger’s topographic dataset.

Is Dapha Bum the highest peak in Arunachal Pradesh?

No.

Dapha Bum is the highest point in:

Namdapha National Park
Changlang district
The Dapha Bum Range

It is not the highest mountain in the entire state of Arunachal Pradesh.

The state’s highest mountains lie much farther north along the India–China border. Kangto, commonly listed at approximately 7,090 metres, is generally recognized as the highest point in Arunachal Pradesh.

This distinction matters because some older articles and educational summaries have mistakenly described Dapha Bum as the state’s highest peak.

📍 Location

Dapha Bum is located in eastern Arunachal Pradesh, within the mountainous northern section of Namdapha National Park and Tiger Reserve.

The peak’s coordinates are approximately:

27.661° N, 96.700° E

The mountain rises close to the northern boundary of Namdapha, where the park adjoins the forested landscapes of the Kamlang region and the broader Lohit highlands.

Although some geographic databases assign Dapha Bum to Lohit district, the Changlang district administration identifies it as the highest peak in Changlang. This apparent inconsistency reflects the mountain’s position close to district boundaries and the way older geographic datasets classify the area.

For the purposes of this guide, Dapha Bum is described as:

A mountain of Changlang district on the northern side of Namdapha National Park, close to the boundary with the adjoining Lohit region.

Where is Namdapha National Park?

Namdapha National Park lies in Changlang district in the easternmost part of Arunachal Pradesh.

The protected area covers approximately 1,985 square kilometres and extends across a remarkable elevation range—from low river valleys at about 200 metres to the summit of Dapha Bum above 4,500 metres.

Namdapha lies close to:

Myanmar to the east and southeast
The Kamlang landscape to the north
The Patkai hills to the south and southeast
The Noa-Dihing River and its tributaries
Miao, the principal gateway town
Vijoynagar, a remote settlement farther east

The park’s immense vertical range allows tropical rainforest, subtropical forest, temperate forest, coniferous vegetation, subalpine habitat, and alpine terrain to occur within one protected landscape.

Dapha Bum forms the high northern end of this dramatic elevation gradient.

The Dapha Bum Ridge

The Dapha Bum Ridge is a long line of high mountains extending generally east to west along the northern side of Namdapha.

Dapha Bum is the highest known point on this ridge.

The ridge separates or divides several forested watersheds and forms part of the mountainous boundary between Namdapha and the highlands farther north. Its steep southern slopes descend toward the Namdapha and Noa-Dihing catchments.

The ridge should not be imagined as a narrow, easily followed hiking crest. It occupies remote terrain characterized by:

Deeply cut valleys
Dense forest
Landslide-prone slopes
High rainfall
Snow at upper elevations
Few established trails
Limited communications
Little documented infrastructure

Even reaching the lower slopes may require multiple days of travel through protected wilderness.

Relationship to the Mishmi Hills

The Dapha Bum Range is commonly treated as part of the Mishmi Hills.

The Mishmi Hills cover a broad and rugged region of eastern Arunachal Pradesh between major river valleys and the international frontiers of India, China and Myanmar.

They include:

Steep mountain ridges
Deep river gorges
Dense subtropical and temperate forests
High rainfall
Alpine uplands
Remote settlements
Exceptional biological diversity

Dapha Bum occupies the southeastern portion of this greater Mishmi highland system, overlooking Namdapha.

Mountain-range boundaries in northeastern India are not always defined consistently. Some references emphasize the Mishmi affiliation, while topographic databases place the mountain within a broader “Parallel Gorges” region extending toward northern Myanmar and southeastern Tibet.

Relationship to the Patkai Hills

The Patkai hills lie mainly to the south and southeast of Namdapha, close to the India–Myanmar border.

Dapha Bum lies to the north.

This creates a broad geographic arrangement:

Dapha Bum and Mishmi highlands → Namdapha valleys → Patkai hills

The national park occupies the mountainous and forested country between these systems.

Dapha Bum should therefore not be described simply as the highest point of the Patkai Range. It belongs to the northern Dapha Bum–Mishmi side of the protected landscape.

Relationship to Myanmar and China

Dapha Bum lies entirely within India, but it rises close to an international mountain region where India approaches both Myanmar and China.

Namdapha’s eastern forests continue toward Myanmar, while the higher mountains north and northeast connect geographically with the ranges of northern Myanmar and southeastern Tibet.

Dapha Bum itself is not identified as an international boundary summit. Peakbagger lists its nation as India and its state as Arunachal Pradesh.

Its nearest higher mountain, Gamlang Razi, lies northeast in the Myanmar–China border region.

The Namdapha River

The Government of Arunachal Pradesh identifies Dapha Bum as the source region of the Namdapha River.

The river descends from the mountain and joins the Noa-Dihing, which crosses the national park and ultimately contributes to the Brahmaputra drainage system.

Water from Dapha Bum therefore flows through a sequence resembling:

Dapha Bum → Namdapha River → Noa-Dihing River → Brahmaputra system

The high mountain catchment receives both rain and seasonal snow. Water descending from its slopes supports forests, streams, pools, wetlands and wildlife habitats at lower elevations.

Nearest established gateway

The principal gateway to Namdapha National Park is Miao, a town in Changlang district.

Miao provides access to the park headquarters and the more frequently visited western section of Namdapha, including the Deban area.

Dapha Bum is far beyond the park’s ordinary visitor zone. A trip to Miao or Deban does not provide direct road access to the summit.

The mountain’s high slopes lie within terrain described by conservation sources as steep, inaccessible and incompletely explored. Visitors should not assume that a mapped straight-line distance can be converted into a practical trekking route.

📏 Elevation & Prominence

Dapha Bum reaches approximately 4,571 to 4,578 metres above sea level.

Using the official Namdapha figure, this equals approximately:

4,571 metres
14,997 feet
4.57 kilometres above sea level

Using Peakbagger’s topographic value, it reaches:

4,578 metres
15,019 feet

The difference is only seven metres and does not affect the mountain’s status as the highest point in Namdapha National Park.

How high is Dapha Bum?

A concise answer is:

Dapha Bum is approximately 4,571 metres, or about 15,000 feet, above sea level.

This makes the summit:

Higher than every mountain in the contiguous United States
Higher than most peaks of the European Alps
High enough to support subalpine and alpine conditions
High enough for seasonal snow
Capable of causing altitude illness in unacclimatized visitors

However, Dapha Bum remains substantially lower than the major peaks of the Arunachal Himalayas, several of which exceed 6,000 or 7,000 metres.

Topographic prominence

Dapha Bum has approximately 1,610 metres (5,282 feet) of topographic prominence.

Prominence measures how far a mountain rises above the lowest saddle connecting it to higher terrain.

Peakbagger lists:

Summit elevation: 4,578 m
Key col elevation: 2,968 m
Prominence: 1,610 m

The calculation is:

4,578 m − 2,968 m = 1,610 m

This substantial prominence means Dapha Bum rises independently above a large surrounding region rather than forming a minor bump on a higher ridge.

An ultra-prominent mountain

A mountain with at least 1,500 metres of topographic prominence is classified as an ultra-prominent peak, usually shortened to an ultra.

Dapha Bum exceeds that threshold by approximately 110 metres.

Its classification as an ultra is particularly significant because the mountain is not exceptionally high by Himalayan standards. Its prominence reveals how strongly it rises above the surrounding valleys and connecting saddles.

Isolation

Dapha Bum has approximately 57 kilometres (35.4 miles) of topographic isolation.

Isolation measures the distance from a summit to the nearest point of equal or greater elevation.

Dapha Bum’s nearest higher terrain lies northeast toward Gamlang Razi, in the mountain region near the Myanmar–China border.

The isolation figure reflects the mountain’s dominant position over eastern Namdapha and the surrounding Mishmi highlands.

Parent peak

Dapha Bum’s topographic parent is Gamlang Razi.

Gamlang Razi rises to approximately 5,870 metres in the remote mountain region northeast of Dapha Bum, close to the Myanmar–China frontier.

A parent peak is the higher mountain reached through the prominence relationship after crossing the key col. It does not mean that Dapha Bum is physically part of the same immediate massif.

The two mountains are separated by:

Large distances
Deep valleys
Remote ridges
International boundaries
Some of Asia’s least accessible mountain country

Nearest higher neighbor

The nearest higher mountain identified in Peakbagger’s database is also Gamlang Razi, northeast of Dapha Bum.

The nearest point reaching Dapha Bum’s elevation or higher is approximately 57 kilometres away, while the summit of Gamlang Razi itself is farther away.

This distinction explains why an elevation-ladder distance to the higher summit may be greater than the mountain’s listed topographic isolation.

Is Dapha Bum difficult because of its elevation?

The summit is high enough to create genuine altitude concerns, but elevation may not be its greatest obstacle.

The primary challenges are more likely to include:

Extreme remoteness
Dense lower-elevation forest
Steep and broken terrain
Numerous rivers and streams
Heavy rainfall
Landslides
Snow at upper elevations
Lack of an established trail
Protected-area restrictions
Limited rescue capability
Sparse mapping and communications

Dapha Bum should not be treated as a straightforward 4,500-metre trekking summit simply because it is lower than the better-known Himalayan giants.

Its wilderness setting may make the approach more complicated than climbs on higher but more developed mountains.

Is Dapha Bum glaciated?

Official forest information refers to water originating from the Dapha Bum area, and some modern descriptions refer to glaciers or snowfields near the source of the Namdapha River.

However, detailed, recent glacier inventories for the exact summit area are not readily available.

The highest slopes receive seasonal snow, and long-lasting snow or small ice bodies may occur in protected high basins. It would be premature to describe Dapha Bum as supporting a large, well-documented glacier system comparable to the high central Himalayas.

The summit is best described as a high, seasonally snow-covered mountain whose upper catchments feed the rivers below.

🏔️ Field Guide Tip

Do not confuse visiting Namdapha National Park with climbing Dapha Bum. The usual visitor routes near Deban explore the park’s lower forests and river valleys, while the summit lies deep within steep, remote and poorly documented terrain. Anyone considering travel toward the upper mountain would need specific permission, experienced local support, detailed route planning and current guidance from the Arunachal Pradesh Forest Department.

🪨 Geology

Dapha Bum rises in one of the most geologically complicated mountain regions of South Asia. The mountain lies within the Mishmi Hills near the eastern Himalayan syntaxis, where the Himalayan arc curves sharply southward toward the ranges of northern Myanmar.

At a regional scale, the Mishmi Hills occupy a zone influenced by the interaction of the Indian, Eurasian, and Myanmar tectonic plates. Geological research describes the area as the easternmost part of the Arunachal Himalaya and notes that its tectonic evolution remains complex and actively studied.

Dapha Bum is therefore not an isolated volcanic peak. Its height and steep relief are connected to:

Tectonic uplift
Folding and faulting
Deep river erosion
Heavy seasonal rainfall
Landslides and slope failure
Long-term weathering
The cutting of valleys by mountain streams

The summit rises above an exceptionally rugged system of ridges and deeply incised watersheds rather than from a broad, open plateau.

A poorly documented summit

Detailed geological descriptions of the exact summit rocks are not readily available in the official and scientific sources reviewed for this guide.

The wider Mishmi region contains varied metamorphic and igneous rock units, but it would be misleading to assign one specific rock type to the entire Dapha Bum summit without a mountain-specific geological survey.

This lack of precise information reflects the mountain’s remoteness. UNESCO’s description of Namdapha states that its higher and interior areas remain largely unexplored because of steep terrain, inaccessibility, and limited infrastructure.

The most accurate description is therefore:

Dapha Bum is a tectonically uplifted mountain of the eastern Arunachal–Mishmi highlands whose present form has been shaped by river erosion, heavy precipitation, weathering, and repeated slope failure.

Steep valleys and river erosion

Water is one of the most important forces shaping Dapha Bum.

The high mountain forms part of the catchment feeding the Namdapha River and ultimately the Noa-Dihing River. Numerous smaller streams descend through the park, cutting narrow valleys and transporting sediment toward the lower forested country.

UNESCO describes Namdapha as steep mountainous terrain crossed by rivers, rivulets, and perennial streams. The official Arunachal Pradesh Forest Department also links the Namdapha River directly with Dapha Bum.

River erosion can create:

Narrow gorges
Unstable valley walls
Waterfalls
Boulder-filled channels
Floodplains at lower elevations
Landslide deposits
Rapidly changing stream crossings

These features make travel difficult even before a route approaches the upper mountain.

Landslides and slope instability

The combination of steep terrain, heavy precipitation, earthquakes, weathered rock, and dense drainage creates significant landslide potential.

Possible mountain hazards include:

Rockfall
Mudslides
Collapsing trail edges
Fallen trees
Flooded streams
Debris flows
Slopes weakened by prolonged rain

A path that was passable during one season may be blocked or altered during the next.

This is especially important in Namdapha, where even established visitor routes may involve river crossings, landslide zones, dense bamboo, and sections without reliable motor access.

Snow and ice

Dapha Bum is high enough to receive snow, particularly during colder months.

The National Tiger Conservation Authority describes several snow-covered peaks above 3,000 metres along the northern side of Namdapha, while official tourism material identifies tributaries descending from snow-covered mountains such as Dapha Bum.

However, no detailed modern glacier inventory has been found for the exact summit.

Dapha Bum should therefore not be described as supporting a large, well-mapped glacier system comparable to the high central Himalayas.

A careful description is that its upper slopes may contain:

Seasonal snow
Long-lasting snow patches
Frozen ground
Ice in shaded gullies
Snow-fed streams

Whether any small permanent ice bodies remain near the summit has not been established by the sources reviewed.

🌧️ Climate and Rainfall

Dapha Bum rises above one of India’s wettest and most humid forest landscapes.

The Arunachal Pradesh Forest Department describes Namdapha as receiving high precipitation distributed throughout much of the year. This moisture, combined with the park’s enormous elevation range, supports forests and vegetation zones extending from tropical lowlands to alpine habitat.

Conditions vary dramatically between the lower park and the summit.

Lower elevations

Near Miao, Deban, and the Noa-Dihing River, conditions are generally:

Warm
Humid
Rainy
Densely forested
Prone to leeches during wet periods
Vulnerable to swollen rivers and muddy paths

Summer and monsoon rainfall can make even ordinary park routes difficult.

Middle elevations

Higher slopes become cooler but remain heavily forested.

Mist, cloud, and rain may reduce visibility. Dense vegetation, slippery ground, and steep slopes can make progress slow even where the horizontal distance appears short.

Upper Dapha Bum

Near the summit, conditions are colder and more exposed.

Visitors could expect:

Strong winds
Freezing nights
Seasonal snow
Rapid cloud formation
Limited shelter
Large temperature changes
Reduced oxygen
Poor visibility

There are no reliable permanent weather observations from the summit, so exact temperature and snowfall figures should not be stated as established facts.

The effect of altitude

Namdapha’s approximately 4,370-metre vertical range produces major climatic transitions over a relatively compact area.

A journey from the lowest forests toward Dapha Bum would pass from warm tropical conditions into temperate, subalpine, and eventually alpine environments.

This is one of the main reasons Namdapha supports such exceptional biological diversity. The official Forest Department recognizes evergreen, moist deciduous, subtropical, temperate, and alpine vegetation within the protected area.

🌿 Flora & Fauna

Dapha Bum occupies the highest end of one of the most biologically varied protected areas in Asia.

Namdapha lies at the meeting point of the Indian subcontinental and Indo-Chinese biogeographic regions. Its vegetation contains strong Indo-Malayan affinities while also including Himalayan and Indian elements.

The mountain’s slopes form part of a remarkable ecological transition from lowland rainforest to alpine vegetation.

Vegetation zones

The official Forest Department identifies five broad vegetation or biome types within Namdapha:

Evergreen forest
Moist deciduous forest
Subtropical forest
Temperate forest
Alpine vegetation

The National Tiger Conservation Authority provides a more detailed classification that includes tropical evergreen and semi-evergreen forest, moist bamboo tracts, East Himalayan moist temperate forest, and moist alpine scrub.

The boundaries between these zones are not perfectly fixed. Local vegetation depends on:

Elevation
Rainfall
Slope direction
Soil
Exposure
River valleys
Disturbance
Cloud and mist

Tropical and subtropical forests

The lower Namdapha landscape contains dense tropical and subtropical vegetation.

These forests may include:

Tall evergreen trees
Semi-evergreen forest
Bamboo
Cane
Ferns
Orchids
Lianas
Palms
Dense undergrowth

This is the environment encountered along most established visitor routes from Deban.

Vegetation can be so thick that travelers may see only a small section of the surrounding landscape despite being close to major mountains.

Temperate forest

As elevation increases, tropical vegetation gives way to cooler temperate forest.

Official sources identify East Himalayan moist temperate forest within the reserve, although detailed surveys of the inaccessible upper slopes remain incomplete.

Possible vegetation in these higher forests may include:

Broadleaf temperate trees
Moss-covered trunks
Ferns
Rhododendron species
Conifers in suitable locations
Dense shrubs
Epiphytes
Lichens

The exact species composition on Dapha Bum itself has not been fully documented.

Subalpine and alpine vegetation

Near the upper mountain, continuous forest eventually gives way to subalpine scrub and alpine vegetation.

Plant growth becomes limited by:

Cold
Wind
Snow
Short growing seasons
Thin soils
Exposed rock

Possible high-elevation plant communities include:

Low shrubs
Alpine grasses
Hardy herbs
Mosses
Lichens
Cushion-like plants
Vegetation beside snowmelt channels

The National Tiger Conservation Authority cautions that the temperate and alpine flora above about 1,800 metres has not been fully explored because of inaccessibility and limited infrastructure.

For this reason, the article should not present a detailed summit plant list as though it were complete.

Botanical diversity

The Arunachal Pradesh Forest Department reports that Botanical Survey of India work has documented hundreds of plant species in Namdapha, including lichens, bryophytes, ferns and their relatives, gymnosperms, and flowering plants.

The National Tiger Conservation Authority lists:

73 species of lichens
56 species of bryophytes
110 species of pteridophytes
5 species of gymnosperms
More than 800 recorded angiosperms, with later observations raising the total higher

These figures apply to the wider reserve—not specifically to Dapha Bum’s summit.

🐅 Wildlife

Namdapha is famous for the exceptional range of animals associated with its different elevation zones.

Official Forest Department and NTCA materials list four large cat species within the wider protected area:

Tiger
Leopard
Clouded leopard
Snow leopard

These species occupy different habitats and elevations. Their inclusion does not mean all four regularly occur together at the same location or that visitors are likely to see them.

Wildlife of the lower forests

The tropical and subtropical forests below Dapha Bum support the greatest variety of large mammals.

Official records include animals such as:

Asian elephant
Hoolock gibbon
Slow loris
Malayan giant squirrel
Sambar
Serow
Wild pig
Dhole
Asiatic black bear
Sun bear
Several smaller cats and civets

The dense vegetation makes sightings difficult. Tracks, calls, droppings, and camera-trap records may provide more evidence of many species than direct encounters.

High-elevation wildlife

The higher Dapha Bum landscape offers colder, more open habitat than the forests near Deban.

Official park material lists snow leopard among Namdapha’s large cats, implying suitable high-elevation habitat somewhere within the northern mountain zone. However, public information about its exact distribution around Dapha Bum is limited.

Other mountain animals potentially associated with higher habitats include:

Goral
Serow
Black bears
Small mountain mammals
High-elevation birds

No animal should be described as common on the summit without direct survey evidence.

Birds

Namdapha is especially important for birds.

The NTCA brief records hundreds of bird species and highlights species such as:

Great pied hornbill
White-winged wood duck
Pheasants
Numerous forest birds

Lower visitor routes are much better for birdwatching than the remote summit slopes because they pass through a greater variety of productive forest habitats.

Reptiles, amphibians and insects

The wet forests support a wide range of smaller animals, including:

King cobras
Kraits
Vipers
Pythons
Frogs and salamanders
Butterflies and moths
Leeches
Numerous insects

These species are concentrated primarily in the warmer and wetter lower elevations rather than near the alpine summit.

Wildlife safety

Anyone traveling in Namdapha should behave as a visitor in wild-animal habitat.

Important precautions include:

Travel with an authorized guide
Avoid walking alone at night
Do not feed wildlife
Keep food secured
Check footwear and bedding
Watch for snakes around logs and rocks
Use leech protection in wet conditions
Remain well back from elephants
Never approach an animal for a photograph

The forest’s density can place people surprisingly close to wildlife before either becomes aware of the other.

🥾 Hiking & Climbing Routes

There is no established public climbing route to the summit of Dapha Bum.

No official trail description, commercial expedition route, maintained base camp, or reliable public ascent history has been identified in the sources reviewed.

UNESCO’s description of Namdapha says the higher and interior regions remain largely unexplored because of their steep and inaccessible terrain.

Dapha Bum should therefore not be presented as a normal trekking peak.

Why the approach is so difficult

The primary obstacle may not be the summit’s technical steepness. It is reaching the upper mountain at all.

An expedition could face:

Dense tropical forest
Bamboo thickets
Deep river crossings
Flooded streams
Leeches
Landslides
Steep untracked ridges
Limited maps
Heavy loads
High rainfall
Protected-area restrictions
No road access
Limited rescue capability
Several different climate zones

A route might begin in warm rainforest and finish in snow and freezing wind.

Established visitor treks do not reach Dapha Bum

Most ordinary trekking in Namdapha begins at Deban, near the western side of the park.

The official Arunachal tourism guide describes a popular route through places such as:

Haldibari
Hornbill Camp
Bulbulia
Ranijheel
Firm Base
52nd Mile

Dapha Bum may be visible from parts of this lower route, including the Firm Base region, but the trail does not continue to the summit.

The tourism guide identifies 52nd Mile as the last point along this core-area direction where the general public may trek without additional special permission.

Deban to 52nd Mile

The Deban–52nd Mile route is a multi-day forest trek rather than a mountain ascent.

It may include:

Ferry or river crossings
Forest camps
Wildlife observation
Birdwatching
Natural salt licks
Hot or sulphurous springs
Muddy paths
Steep climbs and descents

The route offers a way to experience the Namdapha landscape and possibly see Dapha Bum from a distance.

It should not be advertised as the Dapha Bum summit route.

Beyond the visitor zone

Travel beyond normal public trekking limits would require additional authorization.

A serious attempt toward Dapha Bum would likely need coordination with:

Namdapha Tiger Reserve authorities
Arunachal Pradesh Forest Department
District administration
Local communities and guides
State or national security authorities where applicable
Medical and emergency-support teams

Because the mountain lies near sensitive international frontier regions, protected-area permission alone may not be sufficient.

Is Dapha Bum technically climbable?

There is not enough publicly available route information to assign Dapha Bum a reliable technical climbing grade.

Potential upper-mountain difficulties may include:

Steep snow
Exposed ridges
Rock scrambling
Ice in shaded gullies
Poor visibility
Corniced snow
Unstable rock
Route-finding problems
Altitude illness

However, listing precise difficulties without an expedition account would be speculative.

The most accurate statement is:

Dapha Bum is a remote exploratory mountaineering objective rather than a documented trekking or climbing route.

Permits

Visitors entering Arunachal Pradesh require additional travel authorization.

The official state tourism website states that:

Indian domestic visitors require an Inner Line Permit
Foreign visitors require a Protected Area Permit

Entry into Namdapha and trekking inside the reserve may require separate Forest Department permission, guide arrangements, and local registration.

Current requirements should be confirmed before travel because rules, permitted routes, and access conditions can change.

🌤️ Best Time to Visit

For an ordinary visit to Namdapha National Park, the official Changlang district guidance recommends October through April, before the onset of the main monsoon.

This period usually offers the best combination of:

Lower rainfall
More manageable river levels
Fewer leeches
Cooler temperatures
Better trekking conditions
Improved road access
Clearer mountain views

This advice applies to visiting the park—not to climbing Dapha Bum.

October and November

The period after the monsoon may offer:

Green forests
Flowing streams
Improved visibility
More stable access than in peak monsoon
Comfortable temperatures at lower elevations

Some paths and roads may still be damaged after heavy rain.

December through February

Winter often provides the driest and coolest trekking conditions in the lower park.

Visitors should be prepared for:

Cool nights at Deban
Cold conditions at higher camps
Snow on distant mountain summits
Shorter daylight
Large temperature differences between forest valleys and high ridges

This may be the best period for ordinary trekking, but the upper mountain would experience much harsher winter conditions.

March and April

March and April can remain suitable for park visits.

Temperatures rise, but rainfall may still be lower than during the monsoon. Wildlife, birds, and flowering plants may be active, although conditions vary each year.

River levels and trail conditions should be checked locally.

Monsoon season

The monsoon can make Namdapha extremely difficult.

Likely problems include:

Flooded rivers
Damaged bridges
Landslides
Deep mud
Leeches
Reduced visibility
Falling trees
Road closures
Unsafe crossings

Official tourism descriptions note that river levels can rise unpredictably and that established routes involve difficult water crossings.

The wetter months may offer rich plant, insect, and amphibian activity, but they are poorly suited to ordinary mountain travel.

Is there a best climbing season for Dapha Bum?

No established summit season can be recommended because there is no documented normal route or regular expedition history.

A theoretical expedition would need to balance:

Lower forest rainfall
River levels
Snow conditions
Upper-mountain cold
Daylight
Landslide risk
Permit availability

Post-monsoon or spring conditions might appear preferable, but making a specific recommendation without route observations would be speculative.

Any future expedition should rely on current reconnaissance rather than a generalized seasonal statement.

🏔️ Field Guide Tip

Visit Namdapha to experience its forests and to view Dapha Bum—not with the assumption that the summit is an available extension of the ordinary trek. Arrange the Inner Line or Protected Area Permit, confirm Forest Department permission, hire an experienced local guide, and treat 52nd Mile as the normal public limit unless authorities explicitly approve travel farther into the reserve.

🧭 Nearby Mountains & Protected Areas

Dapha Bum rises within a vast mountain-and-forest landscape extending across eastern Arunachal Pradesh and toward northern Myanmar.

Its closest geographical relationships are not with heavily climbed Himalayan summits but with remote ridges, deep river valleys, tiger reserves, and protected forests that remain difficult to explore.

Gamlang Razi

Gamlang Razi is identified as Dapha Bum’s nearest higher neighbor and topographic parent.

It lies northeast of Dapha Bum in the exceptionally remote mountains near the Myanmar–China frontier. The two summits are separated by approximately 57 kilometers of lower terrain, deep valleys, high ridges, and international-border country.

The relationship is topographic rather than recreational. There is no established trekking connection between Dapha Bum and Gamlang Razi, and the intervening landscape should not be interpreted as an accessible mountain traverse.

Gamlang Razi’s role as the nearest higher neighbor demonstrates Dapha Bum’s dominance over eastern Arunachal Pradesh. No terrain of equal elevation occurs within roughly 57 kilometers of the summit.

The Mishmi Hills

Dapha Bum is commonly associated with the Mishmi Hills, a rugged mountain region of eastern Arunachal Pradesh.

The Mishmi highlands are characterized by:

Deep river gorges
Forested ridges
High rainfall
Temperate and alpine habitats
Remote valleys
Sparse road access
Exceptional biological diversity

The name covers a broad geographical region rather than one perfectly defined ridge.

Dapha Bum occupies the southeastern side of this mountain system, where the highlands descend toward Namdapha and the international frontier with Myanmar.

The Patkai Hills

The Patkai Hills rise primarily south and southeast of Namdapha.

They extend along the India–Myanmar frontier and form a series of densely forested ridges separating parts of northeastern India from Myanmar.

Dapha Bum lies north of the principal Patkai hills. The two mountain systems frame Namdapha National Park:

Dapha Bum and the Mishmi highlands → Namdapha valleys → Patkai Hills

This arrangement helps create the park’s remarkable combination of northern mountain habitats and southern tropical forests.

Kamlang Tiger Reserve

Kamlang Tiger Reserve and Wildlife Sanctuary adjoins the wider Namdapha landscape to the north.

It protects forests, rivers, steep mountain slopes, and high-elevation habitats within the Mishmi Hills. Together, Kamlang and Namdapha form part of an extensive conservation landscape rather than isolated islands of protected habitat.

The connection is important for animals that move across large territories, including:

Tigers
Leopards
Clouded leopards
Bears
Ungulates
Smaller forest mammals
Numerous bird species

Official ecotourism guidance groups Namdapha and Kamlang within the same eastern Arunachal conservation circuit.

Kamlang has its own visitor areas and access arrangements. Permission to visit Kamlang does not provide access to Dapha Bum or the interior of Namdapha.

Namdapha National Park and Tiger Reserve

Dapha Bum is the highest point of Namdapha National Park and Tiger Reserve.

The protected area covers approximately 1,985 square kilometers and extends from low tropical valleys at about 200 meters to the summit of Dapha Bum at approximately 4,571 meters.

This elevation range allows Namdapha to protect an unusual sequence of habitats:

Tropical evergreen rainforest
Semi-evergreen forest
Moist deciduous forest
Bamboo and cane
Subtropical forest
Temperate broadleaf forest
Higher montane forest
Subalpine scrub
Alpine vegetation
Snow-covered upper slopes

The park was declared a national park and tiger reserve in 1983.

It lies within the Eastern Himalaya biodiversity region and near the meeting point of Indian, Himalayan, Indo-Chinese, and northern Myanmar ecosystems.

Forests across the Myanmar frontier

Namdapha’s forests continue eastward toward protected and comparatively undeveloped landscapes in Myanmar.

Wild animals do not recognize political boundaries, so the ecological health of Namdapha is connected with forests beyond India’s frontier.

This wider landscape includes:

Patkai hill forests
Northern Myanmar wilderness
Jairampur forest areas
Vijoynagar forests
Kamlang Tiger Reserve
River catchments draining toward the Brahmaputra and Chindwin systems

Maintaining forest connections is particularly important for species that require large home ranges or move seasonally between elevations.

🏞️ Conservation Importance

Dapha Bum’s greatest importance may be ecological rather than mountaineering.

Its high slopes form the upper end of an enormous protected watershed. Rain and snow falling on the mountain feed streams that descend through temperate, subtropical, and tropical forests before entering the Noa-Dihing and Brahmaputra systems.

A complete mountain-to-rainforest gradient

Few protected areas contain such an extensive transition from tropical rainforest to alpine terrain within one continuous landscape.

The gradient allows species adapted to very different conditions to survive within the same reserve.

At lower elevations, the environment is warm, humid, and densely forested. Higher on the mountain, temperatures decrease and tropical species give way to temperate and subalpine communities. Near the summit, tree growth becomes limited and alpine vegetation, snow, rock, and exposed ridges dominate.

This variety supports:

High plant diversity
Large numbers of bird species
Primates
Forest cats
Bears
Deer and other ungulates
Reptiles and amphibians
Butterflies and other insects
High-elevation wildlife

Not all species occur throughout the full elevation range. Each occupies the habitats and climatic zones suited to its needs.

Four large cat species

Government descriptions of Namdapha identify records of four major cat species across the wider protected area:

Tiger
Leopard
Clouded leopard
Snow leopard

These cats occupy different ecological zones.

Tigers and clouded leopards are associated mainly with forest habitats, while snow leopards require high, cold mountain terrain. Leopards can use a broad range of environments.

The presence of all four within one protected landscape reflects Namdapha’s exceptional elevation range. It does not mean that visitors are likely to encounter them or that all four share the same immediate habitat.

An incompletely studied wilderness

Namdapha is frequently described as biologically rich but incompletely surveyed.

The park’s interior presents major challenges to scientific work:

Dense vegetation
Heavy rainfall
River crossings
Landslides
Few trails
Remote upper valleys
Difficult communications
Limited permanent infrastructure

The highest and most inaccessible sections around Dapha Bum remain particularly poorly documented.

This means that plant and animal inventories should be treated as works in progress. Future field research may identify additional species, refine distribution maps, and improve understanding of the upper mountain.

Namdapha and UNESCO

Namdapha National Park has appeared on India’s UNESCO World Heritage Tentative List since 2006.

A tentative listing is not the same as full World Heritage status. It indicates that the site has been identified for possible future nomination and evaluation.

The proposed natural values include:

Exceptional scenery
Large wilderness areas
Ecological processes
Habitat diversity
Rare and threatened species
Connections with adjoining forests

Dapha Bum plays an important role in this proposed landscape because it forms the park’s highest point and completes its extraordinary vertical range.

Conservation pressures

Despite its remoteness, Namdapha faces conservation challenges.

Potential pressures include:

Hunting and wildlife poaching
Unsustainable extraction of forest resources
Encroachment
Road and infrastructure development
Forest fires
River disturbance
Climate change
Habitat fragmentation
Limited staffing and difficult enforcement
Waste from visitors and camps

Climate change may also alter rainfall, snow persistence, stream flow, vegetation zones, and the distribution of high-elevation species.

Because Dapha Bum’s upper environment is not regularly monitored, changes there may be difficult to document quickly.

Responsible tourism

Well-managed ecotourism can support conservation by creating employment, increasing public awareness, and providing economic value to intact forests.

Poorly managed tourism can create:

Litter
Water contamination
Wildlife disturbance
Trail erosion
Illegal entry into restricted zones
Pressure on local resources
Increased fire risk

Visitors should use authorized guides, stay within permitted areas, carry out waste, and follow instructions from park authorities.

📍 Places to Visit in the Namdapha Region

Most visitors experience Dapha Bum as a distant mountain above Namdapha rather than as a summit destination.

The practical visitor areas lie much lower in the park.

Miao

Miao is the principal gateway to Namdapha National Park.

The town lies beside the Noa-Dihing River and provides access to:

Park administration
Guides
Transportation
Accommodation
Food and supplies
Permit information
Local cultural experiences

Miao is approximately 160 kilometers by road from Dibrugarh and about 115 kilometers from Tinsukia, although road conditions and travel times can vary.

Visitors should complete arrangements in Miao before entering the park.

Deban

Deban is the main forest camp and visitor base within Namdapha.

It lies approximately 26 kilometers from Miao beside the Noa-Dihing River. The route passes through forest, streams, narrow gorges, and hilly terrain.

Deban offers access to:

Riverside scenery
Forest walks
Birdwatching
Approved trekking routes
Camping
Nature observation
The Forest Rest House

Accommodation should be reserved in advance.

Deban is still at a low elevation relative to Dapha Bum. Staying there does not place visitors close to the summit in practical travel terms.

Haldibari

Haldibari is one of the forest-camp areas used on established Namdapha trekking routes.

The journey passes through dense vegetation where wildlife may be difficult to see despite its presence. Bird calls, tracks, tree movement, and signs left by animals can be as important as direct sightings.

Camp availability and trail permission should be confirmed before departure.

Hornbill Camp

Hornbill Camp is associated with birdwatching and forest trekking in the lower Namdapha landscape.

The surrounding habitat may support hornbills, forest songbirds, primates, squirrels, butterflies, and other wildlife.

Visitors should keep noise low, avoid playing recorded bird calls excessively, and remain on approved routes.

Bulbulia

Bulbulia is known as a forest-camp area with natural springs or mineral-rich water emerging from the ground.

Its remote setting provides a deeper experience of Namdapha’s interior forest than the more accessible Deban area.

Reaching Bulbulia requires guides, permits, supplies, and overnight trekking arrangements.

Firm Base

Firm Base lies far inside the park and has been used as a destination on longer Namdapha treks.

The route crosses remote forest country and may provide views toward the surrounding mountains, including the Dapha Bum highlands when weather and vegetation permit.

Firm Base is not a Dapha Bum base camp and should not be described as the beginning of an established summit route.

52nd Mile

52nd Mile represents one of the farther destinations described in official adventure-tourism material for the ordinary Namdapha trekking corridor.

Travel beyond the usual visitor route may require additional authorization.

Reaching 52nd Mile is already a serious forest journey. It should not be treated as a casual extension of a stay at Deban.

Vijoynagar

Vijoynagar, also called Vijaynagar, is an extremely remote inhabited region east of the main Namdapha wilderness.

It is surrounded on three sides by Myanmar and separated from Miao by approximately 157 kilometers of forest country. The district administration describes the journey on foot as taking around six days.

Vijoynagar is not the access point for a normal Dapha Bum climb.

Its remoteness nevertheless illustrates the scale and difficulty of travel across the Namdapha landscape. Visitors considering the journey require current information about transportation, accommodation, permissions, supplies, and weather.

💡 Fun Facts

Dapha Bum is the highest point of Namdapha National Park.
The official protected-area elevation is approximately 4,571 meters.
Peakbagger lists the summit at 4,578 meters.
Its prominence of approximately 1,610 meters qualifies it as an ultra-prominent mountain.
Gamlang Razi is its nearest higher neighbor.
Dapha Bum is the highest mountain in Changlang district, but it is not the highest peak in Arunachal Pradesh.
The park rises from tropical lowlands at roughly 200 meters to alpine terrain above 4,500 meters.
The Namdapha River originates in the Dapha Bum highlands.
Water from the mountain eventually enters the Noa-Dihing and Brahmaputra river systems.
Namdapha protects tropical, subtropical, temperate, subalpine, and alpine habitats.
Official sources report tiger, leopard, clouded leopard, and snow leopard within the wider protected landscape.
The upper slopes and interior valleys around Dapha Bum remain poorly explored.
No established public climbing route to the summit has been documented.
Namdapha has been included on India’s UNESCO World Heritage Tentative List since 2006.
The mountain’s remoteness may present a greater obstacle than its elevation alone.

❓ Frequently Asked Questions

Where is Dapha Bum located?

Dapha Bum is located in Arunachal Pradesh, India, on the northern side of Namdapha National Park and Tiger Reserve.

It lies close to the boundary between the Changlang and Lohit regions.

How high is Dapha Bum?

Official Namdapha sources list Dapha Bum at approximately 4,571 meters (14,997 feet).

Peakbagger lists an elevation of 4,578 meters (15,020 feet).

Is Dapha Bum the highest peak in Arunachal Pradesh?

No.

Dapha Bum is the highest point of Namdapha National Park and Changlang district, but higher mountains occur in northern Arunachal Pradesh.

Kangto, on the India–China frontier, is generally recognized as the state’s highest mountain.

Is Dapha Bum part of Namdapha National Park?

Yes.

Dapha Bum forms the highest point of the protected area and rises above its northern mountain zone.

Which mountain range contains Dapha Bum?

Dapha Bum is the highest point of the Dapha Bum Range and is commonly associated with the Mishmi Hills.

It lies north of the Patkai Hills.

Is Dapha Bum an ultra-prominent mountain?

Yes.

Its topographic prominence is approximately 1,610 meters, exceeding the 1,500-meter threshold used to define an ultra-prominent peak.

What is Dapha Bum’s nearest higher mountain?

Peakbagger identifies Gamlang Razi as the nearest higher neighbor.

The nearest terrain reaching a greater elevation lies approximately 57 kilometers northeast of Dapha Bum.

Has Dapha Bum been climbed?

No dependable public record of a confirmed summit ascent was found in the sources reviewed for this guide.

Peakbagger has no ascents or attempts logged for the mountain, but this does not prove that no local traveler, surveyor, hunter, or scientific party has ever reached the summit.

The ascent history should be considered undocumented rather than definitively unclimbed.

Is there a marked trail to the summit?

No established public summit trail has been identified.

The official trekking routes in Namdapha explore lower forests and destinations such as Deban, Hornbill Camp, Bulbulia, Firm Base, and 52nd Mile.

They do not constitute a normal route to Dapha Bum.

Can tourists see Dapha Bum?

The mountain may be visible from parts of the park and longer forest routes when cloud, vegetation, and weather permit.

Clear views cannot be guaranteed because Namdapha receives heavy rainfall and the mountain is frequently obscured by cloud.

Can tourists climb Dapha Bum?

Dapha Bum is not an ordinary tourist or trekking summit.

Any serious attempt would require explicit permission from park and government authorities, experienced local support, expedition logistics, communications, medical planning, and reconnaissance.

What is the best time to visit Namdapha?

The Changlang district administration recommends October through April.

This generally offers lower rainfall and better access than the monsoon months.

Does Dapha Bum have glaciers?

Seasonal snow and possibly long-lasting ice or snow patches occur on the upper mountain.

No detailed modern evidence of an extensive, well-mapped glacier system was found for the exact summit area.

Which river begins at Dapha Bum?

The Namdapha River originates in the Dapha Bum highlands.

It joins the Noa-Dihing drainage, which ultimately contributes to the Brahmaputra river system.

Why is Namdapha important?

Namdapha protects one of Asia’s great mountain-to-rainforest wildernesses.

Its exceptional elevation range supports tropical, temperate, and alpine ecosystems within one connected protected landscape.

Is Namdapha a UNESCO World Heritage Site?

Not currently.

Namdapha has been included on India’s UNESCO World Heritage Tentative List since 2006, but it has not yet been inscribed as a full World Heritage Site.

Where should visitors stay?

Miao offers several accommodation options and is the principal gateway town.

Deban has a Forest Rest House and forest-camp facilities inside the national park. Advance booking and current confirmation are essential.

🏔️ Field Guide Tip

Plan a Namdapha visit around the lower forest experience rather than a presumed Dapha Bum ascent. Base yourself in Miao or Deban, hire an authorized local guide, confirm every overnight camp in advance, and allow extra days for rain, river crossings, road delays, or permit changes. Never continue beyond the approved trekking limit simply because an online map appears to show a route.

🔗 Related Mountain Guides

Sources

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