🏔️ Overview
The Teton Range, commonly called the Tetons, is one of the most recognizable mountain ranges in the American West. Rising abruptly above Jackson Hole in northwestern Wyoming, its jagged summits, deep glacial canyons, alpine lakes, and exposed rock faces form the dramatic centerpiece of Grand Teton National Park.
The range is part of the larger Rocky Mountains and lies immediately south of Yellowstone National Park. Although the rocks exposed in the Tetons are extraordinarily ancient—some are more than 2.7 billion years old—the modern range itself is geologically young. Most of its present-day uplift began roughly 10 million years ago as movement along the Teton Fault raised the mountain block while the neighboring Jackson Hole basin dropped.
The highest summit is Grand Teton, which reaches approximately 13,775 feet (4,199 meters). Other prominent mountains include Mount Owen, Middle Teton, Mount Moran, Teewinot Mountain, and South Teton.
Unlike many mountain ranges bordered by extensive foothills, the eastern side of the Tetons rises strikingly from the relatively flat floor of Jackson Hole. This abrupt relief is one of the reasons the range has become such an enduring symbol of the Rocky Mountain landscape.
⚡ Fast Facts
| Feature | Details |
|---|---|
| Continent | North America |
| Country | United States |
| State | Wyoming |
| Mountain System | Rocky Mountains |
| Highest Peak | Grand Teton |
| Highest Elevation | Approx. 13,775 ft / 4,199 m |
| Grand Teton Prominence | Approx. 6,535 ft / 1,992 m |
| Grand Teton Isolation | Approx. 69.35 mi / 111.61 km |
| Grand Teton Parent Peak | Gannett Peak |
| Grand Teton Nearest Higher Neighbor | Gannett Peak |
| Approximate Range Length | About 40–45 mi / 64–72 km |
| Major Protected Area | Grand Teton National Park |
| Nearby Major Valley | Jackson Hole |
| Major Fault | Teton Fault |
| Notable Trail | Teton Crest Trail |
Peakbagger’s lidar-refined data gives the summit elevation of Grand Teton as 13,774.5 feet, commonly rounded to 13,775 feet.
📍 Location
The Teton Range lies in northwestern Wyoming, immediately east of the Wyoming–Idaho border and south of Yellowstone National Park.
The range runs primarily north to south. Jackson Hole lies directly to its east, while the western side descends toward the valleys and highlands of eastern Idaho.
Much of the best-known portion of the range is protected within Grand Teton National Park, which preserves not only the high summits but also lakes, rivers, forests, sagebrush flats, wildlife habitat, and extensive backcountry.
The Tetons form part of the Greater Yellowstone Ecosystem, one of the largest relatively intact temperate ecosystems remaining in the world.
Nearby mountain systems include the Wind River Range farther southeast. The Wind Rivers contain Gannett Peak, Wyoming’s highest summit.
📏 Highest Peaks of the Teton Range
The central Tetons contain a remarkable concentration of steep alpine summits.
Some of the range’s most notable peaks include:
| Peak | Approximate Elevation |
|---|---|
| Grand Teton | 13,775 ft / 4,199 m |
| Mount Owen | 12,931 ft / 3,941 m |
| Middle Teton | 12,803 ft / 3,902 m |
| Mount Moran | 12,610 ft / 3,844 m |
| Teewinot Mountain | 12,332 ft / 3,759 m |
| South Teton | About 12,500 ft / 3,810 m |
The Grand Teton is not Wyoming’s highest mountain. That distinction belongs to Gannett Peak, which reaches approximately 13,810 feet in the Wind River Range.
Grand Teton is nevertheless far more visually prominent from many viewpoints because of the extraordinary relief between its summit and Jackson Hole.
The Cathedral Group
Several of the most dramatic central peaks are collectively known as the Cathedral Group.
The group includes Grand Teton, Mount Owen, and Teewinot Mountain and is associated with some of the steepest and most visually striking terrain in Grand Teton National Park.
Glacial erosion combined with resistant granite and gneiss helped produce the sharp ridges, cirques, steep walls, and deeply incised valleys seen throughout this part of the range.
🪨 Geology
The geological story of the Teton Range is unusual because it combines very old rocks with very young mountains.
Much of the range’s core consists of metamorphic and igneous rocks dating back billions of years.
Ancient Gneiss
Some of the oldest exposed rocks are approximately 2.7 billion years old.
Sediments and volcanic materials were buried deep within Earth’s crust, where intense heat and pressure transformed them into metamorphic rock called gneiss.
The alternating light and dark mineral bands visible in some Teton rocks record these ancient metamorphic processes.
Granite Intrusions
Around 2.5 billion years ago, magma entered fractures within the older metamorphic rocks. As the magma cooled underground, it crystallized into granite.
This resistant granite now forms important parts of several high peaks, including:
- Grand Teton
- Middle Teton
- Mount Owen
- Teewinot Mountain
- Mount Moran
Later episodes of magma intrusion also created distinctive dark diabase dikes.
One of the best-known examples can be seen cutting across Mount Moran.
🌎 The Teton Fault and the Birth of the Modern Range
The modern Teton landscape began developing much more recently.
Starting around 10 million years ago, Earth’s crust in this region began stretching roughly east to west. This extension created a major normal fault along the eastern base of the range—the Teton Fault.
As movement occurred:
- The block containing the Teton Range moved upward.
- The block beneath Jackson Hole dropped downward.
- Repeated earthquakes gradually increased the difference in elevation between the mountains and valley.
The Teton Fault extends for roughly 40–44 miles along the eastern base of the range.
The cumulative vertical displacement produced by fault movement is enormous. Geological estimates place the total offset at roughly 25,000 to more than 30,000 feet, although much of that structural displacement is not expressed as present-day surface relief because erosion and sedimentation have continually modified the landscape.
The fault remains active.
Geological evidence shows that powerful prehistoric earthquakes occurred along it, and the fault is capable of producing large earthquakes in the future.
🧊 Glaciers and Ice-Age Landscapes
Glaciers played an equally important role in shaping the modern Tetons.
During repeated Pleistocene glaciations, enormous masses of ice flowed through the mountains and Jackson Hole.
Glaciers transformed existing river valleys into the characteristic U-shaped canyons visible today.
Important glacially carved canyons include:
- Cascade Canyon
- Paintbrush Canyon
- Death Canyon
- Granite Canyon
Glacial erosion also sharpened ridges, excavated basins, transported huge quantities of rock, and helped create many of the lakes now found near the base of the mountains.
Jenny Lake, Taggart Lake, and other lakes are closely associated with the range’s glacial history.
Moraines—ridges of debris deposited by glaciers—remain visible around portions of the landscape.
A number of small glaciers and permanent ice features still survive in the high Tetons, although they are much smaller than the glaciers that shaped the range during the Ice Age.
🌿 Flora
The extraordinary elevation range between Jackson Hole and the high summits creates several distinct plant communities.
More than 1,000 species of vascular plants occur in Grand Teton National Park and the surrounding region.
Sagebrush Flats
Much of Jackson Hole consists of glacial outwash deposits with relatively dry, rocky soils.
Big sagebrush dominates large portions of this landscape.
Other plants found in lower-elevation communities include rabbitbrush, antelope bitterbrush, lupines, larkspur, and numerous grasses and wildflowers.
Forests
At higher elevations and in locations with greater moisture, forests become increasingly important.
Coniferous trees cover many mountain slopes and glacial moraines.
Forest habitats also contain berries and shrubs that provide food for birds, bears, and other wildlife.
Alpine Tundra
Above treeline, plants must survive:
- Strong winds
- Long winters
- Short growing seasons
- Thin soils
- Intense sunlight
- Freezing temperatures
Alpine plants often remain small and grow close to the ground.
Species found in the high country include alpine forget-me-not, moss campion, and sky pilot.
🐻 Wildlife
The Teton Range lies at the heart of one of North America’s great wildlife landscapes.
Animals found in and around the mountains include:
- Grizzly bears
- Black bears
- Moose
- Elk
- Bison
- Mule deer
- Pronghorn
- Bighorn sheep
- Coyotes
- Wolves
- Yellow-bellied marmots
- Pikas
- Golden eagles
- Ospreys
More than 300 species of birds have been recorded in Grand Teton National Park.
Elevation strongly influences wildlife habitat. Bighorn sheep and pikas can inhabit high alpine environments, while moose frequent willow-rich wetlands and riparian areas. Elk, bison, pronghorn, and other large mammals commonly use the broader valley landscape.
Grizzly and black bears occur throughout portions of the park, making proper food storage and bear awareness essential for hikers and backpackers.
🥾 Hiking in the Teton Range
The Tetons contain hiking opportunities ranging from short lakeshore walks to demanding multi-day backpacking routes.
Jenny Lake and Inspiration Point
Jenny Lake provides one of the most accessible introductions to the Teton landscape.
Popular destinations in the area include:
- Jenny Lake
- Hidden Falls
- Inspiration Point
- Cascade Canyon
From the Jenny Lake area, hikers can continue into Cascade Canyon and experience the interior of the range.
Cascade Canyon
Cascade Canyon is a classic glacial valley extending deep into the mountains.
The trail provides close views of steep rock walls, forests, streams, alpine vegetation, and high peaks.
It also connects with routes leading toward Lake Solitude and the Teton Crest Trail.
Paintbrush Canyon
Paintbrush Canyon is another major route into the high country.
It can be combined with Cascade Canyon to create the challenging Paintbrush–Cascade Canyon Loop.
High sections of this route can retain snow well into summer, particularly around Paintbrush Divide.
Teton Crest Trail
The Teton Crest Trail is one of the best-known backpacking routes in the Rocky Mountains.
A commonly described version of the point-to-point route runs approximately 39 miles, beginning near Phillips Pass and ending near String Lake.
The route accumulates more than 9,000 feet of elevation gain while crossing spectacular high-country terrain.
Backpackers travel through or near landscapes such as:
- Granite Canyon
- Marion Lake
- Death Canyon Shelf
- Alaska Basin
- Hurricane Pass
- Cascade Canyon
- Paintbrush Canyon
Several variations are possible depending on trailheads, transportation, and whether a hiker uses the aerial tram near Teton Village.
Overnight backcountry travel inside Grand Teton National Park requires the appropriate permit.
🏔️ Field Guide Tip: High-elevation Teton trails can retain steep snowfields much later than trails in Jackson Hole. Check current NPS trail conditions before leaving the trailhead rather than assuming that summer conditions in the valley mean snow-free travel at mountain passes.
🧗 Climbing the Tetons
The Teton Range has an important place in American mountaineering.
Grand Teton in particular is a major technical climbing objective rather than an ordinary hiking summit.
Routes on Grand Teton require combinations of:
- Rock climbing
- Route-finding
- Exposure management
- Mountain-weather judgment
- Appropriate technical equipment
- Rappelling or other rope skills on many itineraries
The Owen-Spalding Route is the traditional standard climbing route on Grand Teton, but even this route involves exposed technical climbing.
Mount Owen, Middle Teton, Teewinot Mountain, and many other summits also present serious alpine objectives.
Anyone without the required technical experience should not treat the high Teton summits as conventional hiking destinations.
🌤️ Best Time to Visit
For most general hiking and sightseeing, summer through early fall provides the most accessible conditions.
However, conditions vary dramatically with elevation.
Late Spring and Early Summer
Snow can linger deep into the hiking season.
High mountain passes may remain covered by steep and potentially dangerous snowfields even when lower trails are dry.
Stream crossings can also become more difficult during periods of heavy snowmelt.
Mid- to Late Summer
July and August typically provide the greatest access to high-country trails, but afternoon thunderstorms are common.
Lightning is particularly dangerous on:
- Summits
- Exposed ridges
- Alpine passes
- Open terrain
Early starts are therefore important for many high-elevation objectives.
Early Fall
September can bring cooler weather, reduced crowds, and beautiful autumn landscapes.
However, freezing temperatures and early snowstorms become increasingly possible as the season progresses.
Winter
Winter transforms the Tetons into a serious snow-covered mountain environment.
Backcountry skiing, mountaineering, and winter travel require skills very different from ordinary summer hiking, including awareness of avalanche conditions.
Before any mountain outing, hikers should consider carrying the Ten Essentials.
⚠️ Hiking and Backcountry Safety
The Teton Range is rugged mountain terrain, and conditions can change quickly.
Important hazards include:
- Sudden thunderstorms
- Lightning
- Snowfields
- Cold temperatures
- High elevation
- Difficult stream crossings
- Navigation errors
- Steep terrain
- Rockfall
- Wildlife encounters
Backcountry travelers should carry appropriate navigation, water-treatment, emergency, and weather-protection equipment.
Untreated water from mountain streams and lakes should not automatically be considered safe to drink.
Hikers should also follow current bear-safety recommendations and maintain appropriate distances from wildlife.
Cell-phone reception can be unreliable in mountainous backcountry.
🏔️ Field Guide Tip: Tell someone your route and expected return time before entering the Teton backcountry. Carry offline navigation and emergency equipment even when your planned trail is popular.
🧭 Nearby Mountains and Attractions
The Tetons are surrounded by some of the most spectacular landscapes in the Rocky Mountains.
Grand Teton National Park
The park protects the iconic eastern face of the range as well as major lakes, canyons, forests, rivers, and wildlife habitat.
Popular locations include:
- Jenny Lake
- Jackson Lake
- String Lake
- Taggart Lake
- Cascade Canyon
- Mormon Row
- Signal Mountain
- Snake River overlooks
Yellowstone National Park
Yellowstone lies immediately north of the greater Teton landscape.
Together, Yellowstone and Grand Teton form the core of the Greater Yellowstone Ecosystem.
Jackson Hole
Jackson Hole is the broad valley east of the Tetons.
The town of Jackson serves as the region’s primary population and tourism center and provides access to both Grand Teton and Yellowstone national parks.
Wind River Range
Farther southeast lies the Wind River Range, another major Wyoming mountain range.
Its highest summit, Gannett Peak, is slightly higher than Grand Teton and is the highest point in Wyoming.
💡 Fun Facts
- The rocks of the Tetons are billions of years older than the modern mountain range itself.
- Grand Teton is the highest summit in the range but not the highest mountain in Wyoming.
- The eastern face of the Tetons has remarkably little in the way of major foothills, helping create its dramatic appearance from Jackson Hole.
- Movement along the Teton Fault continues to shape the landscape.
- Some of the most obvious features of the range—including U-shaped canyons and moraine-dammed lakes—were created or modified by glaciers.
- The dark stripe visible on Mount Moran is a massive ancient diabase intrusion.
- The Tetons are considered among the youngest major mountain ranges in the Rocky Mountain system.
- The difference in elevation between Jackson Hole and the highest summits exceeds 7,000 feet in places.
❓ Frequently Asked Questions
What is the highest mountain in the Teton Range?
Grand Teton is the highest mountain in the range, reaching approximately 13,775 feet (4,199 meters).
Are the Tetons part of the Rocky Mountains?
Yes. The Teton Range is part of the broader Rocky Mountain system of western North America.
Where is the Teton Range?
The Tetons are located primarily in northwestern Wyoming, immediately east of the Idaho border and just south of Yellowstone National Park.
How long is the Teton Range?
The main range extends approximately 40 to 45 miles from north to south, depending on the boundaries used.
Why do the Tetons rise so abruptly?
The dramatic eastern face of the range is closely associated with movement along the Teton Fault. The mountain block has been uplifted while the Jackson Hole block has moved downward.
How old is the Teton Range?
The modern fault-block range began forming roughly 10 million years ago, making it exceptionally young compared with many other major North American mountain ranges.
How old are the rocks in the Tetons?
Some of the metamorphic rocks exposed in the Teton Range are more than 2.7 billion years old.
Can you hike to the top of Grand Teton?
Grand Teton is not a normal hiking summit. Standard summit routes involve technical rock climbing, substantial exposure, and mountaineering skills.
What is the Teton Crest Trail?
The Teton Crest Trail is a famous high-elevation backpacking route through the Teton Range. One commonly used point-to-point itinerary covers approximately 39 miles and gains more than 9,000 feet.
Are there bears in the Teton Range?
Yes. Both grizzly bears and black bears live in the region. Visitors should follow current National Park Service bear-safety guidance.
Is Grand Teton the highest mountain in Wyoming?
No. Wyoming’s highest mountain is Gannett Peak, at approximately 13,810 feet, in the Wind River Range.
🔗 Related Articles
- Grand Teton
- The Rocky Mountains
- Wind River Range
- Gannett Peak
- Mountain Ranges in the U.S.
- The World’s Top 100 Mountain Ranges
- The Ten Essentials for Hiking: What Every Hiker Should Carry
📚 Sources
- National Park Service — Geologic Activity, Grand Teton National Park
- U.S. Geological Survey — Young Mountains, Old Rocks: A Geological Overview of the Teton Range
- U.S. Geological Survey — Geology of Grand Teton National Park
- National Park Service — Plants of Grand Teton National Park
- National Park Service — Wildlife of Grand Teton National Park
- National Park Service — Backcountry Camping Routes and Zones
- National Park Service — Backcountry Camping
- National Park Service — Safety in Grand Teton National Park
- Peakbagger — Grand Teton, Wyoming
- Peakbagger — Teton Range 11,000-Foot Peaks
