Lugnaquilla

Lugnaquilla | Lugnaquillia | Log na Coille

Lugnaquilla rises above the southern Wicklow Mountains as the highest mountain in County Wicklow and the entire province of Leinster. Reaching 925 meters (3,035 feet), it is also the highest mountain in Ireland outside County Kerry.

Often shortened simply to “Lug,” the mountain is very different in character from a sharp, rocky alpine summit. Lugnaquilla is broad, sprawling, grassy and exposed, with an extensive summit plateau that can become exceptionally difficult to navigate when cloud or fog descends.

Its combination of height, isolation, glacial scenery and challenging navigation makes Lugnaquilla one of the most significant mountains in Ireland.

🏔️ Overview

Lugnaquilla is the highest summit of the Wicklow Mountains, a large upland region occupying much of County Wicklow in eastern Ireland.

The mountain overlooks the Glen of Imaal to the west and Glenmalure to the east. Rather than forming a narrow rocky pinnacle, Lugnaquilla rises as an enormous upland massif surrounded by ridges, deep glacial valleys, corries and smaller neighboring summits.

Its summit area is often known as Percy’s Table, a broad, relatively flat plateau. This apparently gentle terrain can be deceptive. In poor visibility, the lack of distinct landmarks makes accurate navigation essential, particularly because steep corrie cliffs lie around parts of the massif.

Lugnaquilla is notable not only for its elevation but also for its considerable topographic prominence and isolation. Peakbagger calculates a prominence of 849 meters (2,785 feet) and a remarkable isolation of approximately 160.1 kilometers (99.5 miles).

⚡ Fast Facts

Fact	Details
Continent	Europe
Country	Ireland
State/Province	Leinster
County/Region	County Wicklow
Mountain Range	Wicklow Mountains
Parent Peak	Carrauntoohil, under the island-parent convention
Elevation	925 m / 3,035 ft
Prominence	849 m / 2,785 ft
Isolation	160.1 km / 99.48 mi
Nearest Higher Neighbor (NHN)	Clawdd Coch, Wales
Key Col	Approximately 76 m / 249 ft
Coordinates	52.9671° N, 6.4646° W
Irish Name	Log na Coille
Common Nickname	Lug
Highest Point Of	County Wicklow, Leinster and the Wicklow Mountains
Mountain Classification	P600, Marilyn, Furth, Hewitt, Arderin, Simm, Vandeleur-Lynam
Typical Terrain	Open mountain, bog, grass, rock and broad summit plateau

📍 Location

Lugnaquilla lies in County Wicklow in eastern Ireland, roughly between the Glen of Imaal and Glenmalure.

It occupies the southern part of the Wicklow Mountains and dominates a substantial mountain massif containing numerous subsidiary ridges and summits.

To the west, the mountain drops toward the Glen of Imaal, an area partly occupied by an active Irish Defence Forces artillery range. To the east lies Glenmalure, one of Ireland’s longest glacial valleys.

The eastern side of the massif also contains Fraughan Rock Glen, a dramatic hanging valley bordered by steep mountain slopes. Other important nearby landscape features include Arts Lough, Kelly’s Lough and the River Ow valley.

Despite being located comparatively close to Dublin, the upper reaches of Lugnaquilla can feel remarkably remote.

📏 Elevation, Prominence & Isolation

Lugnaquilla reaches 925 meters (3,035 feet) above sea level.

That makes it:

• The highest mountain in the Wicklow Mountains
• The highest point in County Wicklow
• The highest point in Leinster
• The highest mountain in Ireland outside County Kerry
• One of Ireland’s mountains exceeding the traditional 3,000-foot threshold

Its elevation also qualifies Lugnaquilla as a Furth — one of the mountains outside Scotland recognized by the Scottish Mountaineering Club as meeting the general height and separation standards associated with Munros.

Prominence

Peakbagger currently calculates Lugnaquilla’s topographic prominence as approximately 849 meters (2,785 feet), using a key col of about 76 meters (249 feet).

Some other sources give Lugnaquilla a prominence of approximately 905 meters. The difference reflects different topographic datasets and calculations of the mountain’s key saddle.

For consistency with Mountain Field Guide’s prominence methodology, this profile uses the 849-meter Peakbagger figure.

Even under the lower figure, Lugnaquilla comfortably exceeds the 600-meter prominence required for classification as a P600, making it one of the most independently rising mountains in Ireland.

Isolation

Lugnaquilla has an exceptional topographic isolation of approximately 160.1 kilometers (99.48 miles).

Higher terrain is not encountered until reaching Clawdd Coch in Wales, across the Irish Sea.

Clawdd Coch reaches approximately 931 meters and lies close to Snowdon (Yr Wyddfa).

This unusually long isolation helps illustrate Lugnaquilla’s geographical importance. Although the summit is below 1,000 meters, there is no higher land anywhere nearby.

🏞️ Geography & Landscape

Lugnaquilla is an enormous, broad mountain rather than a narrow or sharply pointed peak.

Its summit plateau, traditionally called Percy’s Table, is covered primarily by grass, rock and exposed upland vegetation.

Two particularly dramatic glacial corries are traditionally known as the:

• North Prison
• South Prison

The North Prison faces toward the Glen of Imaal, while the South Prison overlooks the upper valley of the River Ow.

These steep-sided hollows are a reminder that the relatively gentle-looking summit plateau is surrounded in places by considerably more serious terrain.

On the eastern side of the mountain, Fraughan Rock Glen forms a spectacular glacial hanging valley above Glenmalure.

Nearby summits associated with the wider Lugnaquilla massif include Cloghernagh, Corrigasleggaun, Slievemaan, Camenabologue, Benleagh and Table Mountain.

The mountain is also associated with the headwaters of the River Slaney, one of southeastern Ireland’s major rivers.

🪨 Geology

Lugnaquilla provides an excellent example of the complex geology of the Wicklow Mountains.

The mountain has been described geologically as a granite-rooted mountain capped by older metamorphic rocks.

Much of the Wicklow region is associated with the enormous Leinster granite body that was emplaced deep within Earth’s crust during the Caledonian mountain-building period hundreds of millions of years ago.

At Lugnaquilla, darker schistose rocks occur above and alongside lighter-colored granite and granodiorite.

The upper mountain retains remnants of the older rock that once formed the roof above the molten granite intrusion.

Ice Age shaping

Glaciation later transformed the landscape.

Ice excavated corries, deepened valleys and sharpened the steep slopes surrounding the mountain. Features such as the North Prison, South Prison and Fraughan Rock Glen reveal the power of the glaciers that once occupied this part of Ireland.

Geological research on exposed bedrock has also indicated that portions of Lugnaquilla’s highest ground may have remained above the surrounding ice during the Last Glacial Maximum.

If so, the upper mountain functioned as a nunatak — an exposed summit protruding above an ice sheet or glacier.

🌿 Flora & Fauna

The landscape surrounding Lugnaquilla is typical of Ireland’s high, wet eastern uplands.

Habitats include areas of:

• Blanket bog
• Wet and dry heath
• Upland grassland
• Rocky slopes
• Mountain streams
• Peatland

Heather, bilberry, grasses, sedges, mosses and other plants adapted to acidic, waterlogged conditions occur throughout the Wicklow uplands.

The larger Wicklow Mountains support deer, foxes and smaller mammals along with a variety of upland birds.

Peregrine falcons are among the notable birds found within the Wicklow Mountains region, while ravens and other species adapted to open upland habitats may also be encountered.

Visitors should minimize erosion by remaining on durable surfaces where possible and avoiding unnecessary disturbance to bog and heath vegetation.

🥾 Hiking & Climbing Routes

Lugnaquilla is normally climbed as a hill walk rather than a technical mountaineering ascent, but that should not be mistaken for an easy mountain.

Visit Wicklow describes Lugnaquilla routes as difficult, generally involving approximately 10–16 kilometers of walking and around five to eight hours, depending on the chosen approach.

There are no universally waymarked routes across the upper mountain, and the broad summit plateau becomes particularly difficult to navigate in cloud.

Glen of Imaal and Camarahill

One of the traditional approaches reaches Lugnaquilla from the Glen of Imaal, climbing via Camarahill.

This side of the mountain requires special care because parts of the Glen of Imaal are used as an active military firing range.

Mountaineering Ireland states that there are two permitted walking routes through Defence Forces land toward Lugnaquilla — the Camarahill route and Table Track route — and they may only be used when firing is not taking place.

Walkers should check current firing schedules before entering the area.

Never enter when red flags or flashing red lights indicate live firing.

Unexploded military objects are another potential hazard. Anything that resembles ammunition or military equipment should be left completely untouched.

Glenmalure

Glenmalure has traditionally provided several approaches toward Lugnaquilla and offers some of the finest scenery around the mountain.

However, hikers need to check current access information carefully.

The privately owned Glenmalure Zig-Zags route was closed to public access in 2023, and walkers should respect that closure unless official guidance changes.

Other route possibilities exist in the wider Glenmalure area, but access across private land can change. Current Mountaineering Ireland information and local signage should always take priority over older guidebooks or online route descriptions.

Aghavannagh

A longer and more remote approach is possible from the Aghavannagh area south of Lugnaquilla.

This route approaches the mountain through long stretches of forest and open mountain terrain toward the South Prison.

It receives considerably less traffic than the better-known northern and eastern approaches and requires strong navigation skills.

🏔️ Field Guide Tip: Lugnaquilla’s broad summit can become almost featureless in fog. Carry a proper topographic map and compass and know how to use them rather than relying exclusively on a phone. Check both the mountain weather and any Glen of Imaal firing-range restrictions before leaving.

⚠️ Why Navigation Matters on Lugnaquilla

Lugnaquilla’s greatest hazard is often not steepness but loss of orientation.

The upper mountain contains broad slopes without the obvious ridges, rock towers or sharp summit lines that make navigation easier on some mountains.

When cloud covers the plateau:

• The summit may be difficult to locate.
• Tracks can disappear into grass and peat.
• Distances are difficult to judge.
• Walkers can descend into the wrong valley.
• Steep corrie terrain may be approached unexpectedly.

GPS can be useful, but electronic devices should complement rather than replace traditional navigation skills.

Waterproof clothing, sturdy footwear, warm layers, food and adequate water should be carried even when conditions appear favorable at lower elevations.

🌤️ Best Time to Visit

Lugnaquilla can be climbed throughout the year, but late spring through early autumn generally provides the greatest amount of daylight and the best chance of manageable conditions.

Even in summer, however, cloud, rain, strong winds and rapid temperature changes are common in the Wicklow Mountains.

Spring

Spring brings increasing daylight but can still produce cold, wet and windy conditions. Boggy ground may remain saturated after winter.

Summer

Summer provides long daylight hours, but weather can still change rapidly. An apparently clear morning is no guarantee of good visibility on the summit.

Autumn

Early autumn can offer excellent walking conditions and atmospheric mountain scenery. Shortening days become increasingly important later in the season.

Winter

Winter ascents should be treated much more seriously. Snow, ice, fog, strong winds and very short daylight hours can turn the normally non-technical mountain into a demanding undertaking.

🧭 Nearby Mountains & Attractions

Lugnaquilla lies in one of eastern Ireland’s finest mountain landscapes.

Wicklow Mountains

The wider Wicklow Mountains contain broad granite uplands, peat bogs, glacial valleys, lakes and dozens of significant summits.

Glenmalure

Glenmalure lies east of Lugnaquilla and is one of the great glacial valleys of the Wicklow Mountains.

Its steep mountainsides, forests and tributary valleys provide some of the most dramatic scenery surrounding Lugnaquilla.

Arts Lough

Arts Lough is a small glacial lake northeast of the summit, tucked beneath surrounding mountain slopes. It is one of the scenic highlights of the Lugnaquilla massif.

Glen of Imaal

West of Lugnaquilla lies the Glen of Imaal, surrounded by mountains including Lugnaquilla, Table Mountain and surrounding uplands.

Because of the active military range, walkers must follow current access regulations carefully.

Glendalough

Farther north, Glendalough is the best-known visitor destination in the Wicklow Mountains. Its glacial valley contains lakes, mountain trails, woodland and the remains of an important early Christian monastic settlement.

💡 Fun Facts

• Lugnaquilla is the highest mountain in Leinster.
• At 925 meters, it is the highest mountain in Ireland outside County Kerry.
• Its Irish name, Log na Coille, is generally interpreted as meaning “hollow of the wood.”
• The mountain is commonly known simply as “Lug.”
• Its summit plateau is known as Percy’s Table.
• Lugnaquilla is a Furth, a mountain outside Scotland that meets the Scottish Mountaineering Club’s relevant Munro-style height and separation criteria.
• Peakbagger calculates an isolation of more than 160 kilometers.
• Its nearest higher neighbor lies not in Ireland but across the Irish Sea in Wales.
• The mountain contains dramatic glacial features known as the North Prison and South Prison.
• Parts of the upper mountain may have protruded above Ice Age glaciers as a nunatak.

❓ Frequently Asked Questions

How high is Lugnaquilla?

Lugnaquilla reaches 925 meters (3,035 feet) above sea level.

Where is Lugnaquilla?

Lugnaquilla is located in County Wicklow, Ireland, in the southern part of the Wicklow Mountains.

Is Lugnaquilla the highest mountain in Ireland?

No. Ireland has higher mountains in County Kerry, including Carrauntoohil. Lugnaquilla is the highest mountain in Ireland outside County Kerry.

Is Lugnaquilla the highest mountain in Leinster?

Yes. Lugnaquilla is the highest point in both County Wicklow and the province of Leinster.

What is Lugnaquilla’s prominence?

Mountain Field Guide uses Peakbagger’s current figure of approximately 849 meters (2,785 feet). Some other sources list approximately 905 meters because different topographic datasets have produced different key-col calculations.

What is Lugnaquilla’s isolation?

Its topographic isolation is approximately 160.1 kilometers (99.48 miles).

What is Lugnaquilla’s nearest higher neighbor?

Peakbagger identifies Clawdd Coch in Wales as Lugnaquilla’s nearest higher neighbor. Clawdd Coch reaches approximately 931 meters.

What does Lugnaquilla mean?

The Irish name Log na Coille is generally translated as “hollow of the wood.”

Is Lugnaquilla difficult to climb?

The normal routes do not require technical rock climbing, but Lugnaquilla is a serious mountain walk. Long distances, boggy terrain, changeable weather and especially difficult navigation on the broad summit plateau make it best suited to properly equipped hikers with navigation skills.

How long does it take to climb Lugnaquilla?

Depending on the route, conditions and walking speed, typical outings may take approximately five to eight hours.

Can you climb Lugnaquilla from the Glen of Imaal?

Yes, but the Glen of Imaal contains an active military firing range. Only designated access routes may be used through Defence Forces land, and those routes are closed during firing exercises. Always check the current schedule before travelling.

Is the Glenmalure Zig-Zags route open?

Mountaineering Ireland announced the closure of the privately owned Glenmalure Zig-Zags access route in March 2023. Walkers should respect the closure and check current access information before planning any route from Glenmalure.

🔗 Related Articles

• Wicklow Mountains — Explore Ireland’s largest continuous upland region and the mountain range containing Lugnaquilla.
• Clawdd Coch — Discover the Welsh summit identified as Lugnaquilla’s nearest higher neighbor.
• Snowdon — Explore Yr Wyddfa, the highest mountain in Wales, located close to Lugnaquilla’s nearest higher terrain.

🔗 Related Hiking and Safety Guides

• Hiking Gear — Essential equipment for mountain walks, navigation and changing weather conditions.

📚 Sources

• Peakbagger — Lugnaquillia Mountain — Elevation, prominence, key col, isolation, coordinates and nearest higher neighbor.
• Visit Wicklow — Lugnaquilla Mountain Trail — General hiking difficulty, route distances, typical walking times and access points.
• Mountaineering Ireland — Stay Safe When Hiking in the Glen of Imaal — Current military-range access and safety information.
• Placenames Database of Ireland — Log na Coille / Lugnaquillia — Official Irish placename information and historical forms of the name.
• Lugnaquilla — Wikipedia — General geographical, geological, historical and classification cross-check.