Carrauntoohil Mountain

Ireland's highest mountain, part of MacGillycuddy's Reeks

Ireland's highest mountain at 1,039 metres, Carrauntoohil rises in MacGillycuddy's Reeks. Hillwalkers and scramblers use established routes from the Hag's Glen and the Caher Valley to reach the summit.

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Carrauntoohil at a Glance#

About Carrauntoohil#

Carrauntoohil is the highest mountain in the island of Ireland at 1,038 metres and forms the centerpiece of the MacGillycuddy’s Reeks in County Kerry. It is the country’s primary mountaineering objective for hikers seeking Ireland’s tallest summit.

Routes range from steep day-hikes to longer ridge traverses; the Hag’s Glen approach with the so-called Devil’s Ladder is the most common line to the summit. The mountain sits within a rugged ridge system with rocky cols and adjoining peaks often climbed in combination.

The massif is a product of deep geological processes and glacial sculpting; it has featured in local hillwalking and mountaineering for more than a century as recreational access to the high country expanded. The area is managed for outdoor use with established paths and some informal route markers.

Carrauntoohil stands in County Kerry within the MacGillycuddy’s Reeks, accessible from towns such as Killarney and Killorglin in southwest Ireland.

  • Main route: The most frequently used ascent follows Hag’s Glen and the marked path to the Devil’s Ladder - a steep, sometimes loose scree route that leads toward the summit ridge.

What to See#

  • Beenkeragh: A nearby summit in the MacGillycuddy’s Reeks ridge that reaches just over 1,000 metres and is linked to Carrauntoohil by high ridgelines and cols.
  • Caher: A neighbouring peak on the main Reeks ridge standing around 1,000 metres, often climbed together with Carrauntoohil as part of a ridge traverse.

How to Get to Carrauntoohil#

Carrauntoohil is the highest peak in MacGillycuddy’s Reeks, County Kerry. The usual approach is by car to one of the valley trailheads in the Reeks (common start points include parking in the Hag’s Glen/Cronin’s Yard area or other marked trailhead car parks); these are reached via local regional roads from the nearby towns of Killarney or Killorglin. From the trailhead expect a multi-hour hike to the summit (steep and rough underfoot).

Public buses and tours run to Killarney from regional hubs; from Killarney you will need a taxi or local transfer to the Reeks trailheads. Check local signage and weather before attempting the ascent.

Tips for Visiting Carrauntoohil#

  • Start early in the day for Carrauntoohil-being Ireland's highest peak, weather can change quickly and mornings often offer the most stable conditions and best visibility.
  • The most direct and commonly used ascent is via Hag's Glen and the Devil's Ladder; note the Devil's Ladder is very exposed and becomes slippery and eroded when wet, so avoid it in poor conditions.
  • If you want a longer ridge experience and fewer steep steps, consider the Coomloughra Horseshoe route instead of the direct ascent; common parking/start points for Hag's Glen routes include Cronin's Yard/Glencar area-allow plenty of daylight and check local mountain weather and advice before setting out.

Best Time to Visit Carrauntoohil#

Best climbed in summer or the shoulder seasons when routes are safest and daylight is longest.

Summer (best for hiking)
Jun-Aug · 5-15°C (on the mountain)
Longest daylight and generally the most stable conditions for routes and scrambling, though weather can change quickly.
Late spring/early autumn
May, Sep · 2-12°C
Cooler but often good conditions with fewer crowds; still be prepared for wet and windy weather.
Winter
Dec-Feb · -5-5°C
Cold, potentially icy or snowy with short daylight hours - only suitable for experienced winter mountaineers with proper kit.

Weather & Climate near Carrauntoohil#

Climate

Carrauntoohil's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in July) and cold winters (coldest in February). Temperatures range from 2°C to 15°C. Heavy rainfall (2496 mm/year), wettest in January.

Air Quality: AQI 27 Good
Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
25°
Warmest Month
-3°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor 2° - 6° -2° 289 mm overcast 88% 10.8 m/s 0.1 low 8.2h
February Poor 2° - 6° -2° 217 mm overcast 87% 10.5 m/s 0.2 low 9.8h
March Poor 2° - 7° -2° 224 mm overcast 86% 9.9 m/s 0.4 low 11.7h
April Poor 2° - 8° 0° 152 mm partly cloudy 85% 8.2 m/s 0.8 moderate 13.7h
May Poor 5° - 11° 4° 157 mm overcast 84% 7.8 m/s 1.2 high 15.4h
June Poor 7° - 13° 10° 136 mm overcast 84% 7.2 m/s 1.4 high 16.3h
July Poor 9° - 15° 12° 138 mm overcast 86% 6.9 m/s 1.4 high 15.9h
August Poor 9° - 15° 12° 176 mm overcast 86% 7.0 m/s 1.1 high 14.4h
September Poor 7° - 13° 7° 201 mm overcast 86% 7.8 m/s 0.7 moderate 12.5h
October Poor 5° - 10° 3° 257 mm overcast 87% 9.1 m/s 0.3 low 10.5h
November Poor 3° - 7° 0° 265 mm overcast 88% 9.9 m/s 0.1 low 8.7h
December Poor 2° - 7° -1° 284 mm overcast 88% 10.2 m/s 0.0 low 7.7h

Nearby Attractions to Carrauntoohil#