Carrauntoohil is the highest mountain in Ireland and the highest point of Macgillycuddy's Reeks in County Kerry, on the Iveragh Peninsula in the southwest of the country. It rises to 1,039 m and is the highest of the 48 named peaks in its range.
It is a major summit in the Munster Ridges and Valleys part of the Northwest European Highlands, with steep glaciated faces, narrow ridges and corries around the top. The mountain is a well-known objective for walkers and climbers, but the terrain is serious and weather can change quickly.
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Carrauntoohil lies in Macgillycuddy's Reeks, within the wider chain of Iveragh Peninsula > Munster Ridges and Valleys > Ireland > British Isles > Northwest European Highlands. Administratively it is in Kenmare Municipal District, County Kerry. At 1,039 m, it is the highest mountain in Ireland and the highest point of the range. The summit area is shaped by sandstone cliffs, corries and ridges, with deep valleys on several sides.
Its setting is strongly mountainous for Ireland, with the peak rising above the surrounding glens and ridgelines rather than broad upland moorland. The mountain is also the top of the country, so it draws walkers from across Ireland and beyond.
The nearest high neighbours are all close enough to form a compact mountain group around the summit. Carrauntoohil is higher than each of them, and the north and west ridges connect it to some of the best-known tops in the range.
From the top, the main higher and nearby peaks within 25 km are part of the same mountain system. To the east is Cnoc na Peiste at 985 m, about 3.2 km away. To the north-west is Skregmore East Top at 852 m, about 1.5 km away. Other notable summits in the wider view include Purple Mountain to the east, Mangerton Mountain farther east, and Curraghmore to the south-west.
The summit outlook is dominated by the ridges and valleys of the Reeks rather than distant lowland scenery. On a clear day, the surrounding high points help show how central Carrauntoohil is within the range.
Carrauntoohil belongs to Macgillycuddy's Reeks, the highest mountain range in Ireland. The range's highest peak is Carrauntoohil itself, and it contains 48 named peaks. Within that range, it ranks first by elevation. The mountain is also the highest point of the whole range and the country, so it is the key summit in any traverse or ridge walk here.
The Reeks are a compact, rugged chain on the Iveragh Peninsula, with long ridges, steep drops and several major summits linked by narrow cols. That structure is what makes the range attractive for longer mountain days as well as single-peak ascents.
The best-known ascent is the Devil's Ladder route from Cronin's Yard and the Carrauntoohil trailhead. It is a steep, loose hillwalk rather than a graded climb, and it is commonly done as a 4-6 hour round trip. Another serious option is Brother O'Shea's Gully from the Hag's Glen, which involves steeper scrambling. Longer mountain days include the Coomloughra Horseshoe and the full MacGillycuddy's Reeks Ridge Walk.
The north-east face also has gullies and arêtes used by rock and winter climbers. These lines are more committing than the standard walking routes and demand good route-finding and mountain experience.
Common starting points are Killarney and Beaufort, with access to the mountain usually arranged from the valley side. The standard approach mentioned in the sources begins at Cronin's Yard, which is used for the Devil's Ladder route. From there, walkers head into the mountain valleys before climbing to the summit ridge.
The mountain is in County Kerry, so most visitors combine the ascent with travel through the Killarney area. For longer ridge walks, the approach is part of a full day in the Macgillycuddy's Reeks rather than a short out-and-back hike.
Climate estimates from NASA POWER for 2001-2020 suggest that the summit is cold but usually above freezing all year. The warmest month is July, at about 9 °C, and the coldest is January, at about 4 °C. Annual precipitation in the surrounding area is about 1,450 mm, with the wettest month in November at about 160 mm and the driest in April at about 90 mm.
In practice, the mountain is exposed to wind, rain, low cloud and sudden changes in visibility. The steep gullies and ridges can also hold wet rock, and winter conditions may bring ice and snow on the upper slopes.
All months are estimated to be above freezing at the summit, but the more settled walking season is usually the warmer part of the year. The drier period around April is often more suitable for a safer ascent, while late autumn and winter tend to be wetter and more exposed. Even in summer, the summit can feel cold because of wind and cloud.
For a straightforward walk, choose a day with good visibility and stable weather. The mountain's steep ground and loose sections make poor conditions much more serious than the temperature alone would suggest.
The mountain is part of a sandstone range with glaciated corries, arêtes and U-shaped valleys. Lower slopes in this part of Kerry typically carry rough grassland, heather and bog, while the higher ground becomes thinner, rockier and more exposed. The summit area itself is largely bare rock and scree, with little shelter from wind.
Wildlife on this kind of Irish mountain terrain is usually limited to hardy upland birds and small mammals, with the main interest for visitors being the geology and the shape of the landscape rather than dense vegetation. The open ridges also mean that weather and visibility matter more than plant cover.
For a mountain of this height and terrain, a certified guide is sensible if you are new to Irish mountain walking, unsure on steep loose ground, or planning a ridge route in poor visibility. In Ireland, the national alpine club and mountaineering federation is Mountaineering Ireland, which is a UIAA member. A named guiding company working in the mountains of Ireland is Kerry Climbing in Killarney.
Organised ascents usually include route choice, pacing, navigation and safety decisions, and the cost depends on the length of the day, group size, equipment and whether more than one day or hut-style accommodation is involved. For a mountain like Carrauntoohil, local knowledge is especially useful on the steeper gullies and ridges.
Carrauntoohil demands proper hillwalking footwear, warm layers, waterproofs and navigation skills. The standard routes are steep, loose and exposed, and the more direct gullies and ridges are more serious still. In poor weather, the summit area can become difficult to follow, and the descent can be harder than the climb. Mobile coverage is patchy and should not be relied on.
The mountain rescue emergency number in Ireland is 112 or 999; ask for the Gardaí, who call out the volunteer mountain rescue teams. Carry a map, compass and downloaded route information before setting out.
The Irish name is Corrán Tuathail, meaning Tuathal's sickle. The mountain is also known by several spellings, including Carrauntoohil, Carrauntoohill, Carrantuohill, Carrauntuohill, Carrantuel, Corran Tuathail, Karauntuhilas and Karrantuil. The name has long been used in anglicised forms, but Carrauntoohil is the standard spelling in official Irish usage.
A summit cross was first erected in the 1950s and later replaced by a steel cross in 1976. It was cut down in 2014 and then put back up shortly after. The mountain's steep north-east side has also led to warning signs being placed on the summit by the Kerry Mountain Rescue Team.
Carrauntoohil is the highest of the 48 named peaks in Macgillycuddy's Reeks, and it is also the highest mountain in Ireland. Its prominence is 1,039 m, matching its elevation, which makes it a very independent summit. The nearest higher peak does not exist in Ireland because this is the country's top point.
It is one of the Furths recognised by the Scottish Mountaineering Club, and it is listed among the 100 Highest Irish Mountains. The mountain's central position in the range, plus its steep glacial landforms, explains why it is both a walking objective and a climbing venue.
How high is Carrauntoohil? It rises to 1,039 m, making it the highest mountain in Ireland.
Where is Carrauntoohil? It is in County Kerry on the Iveragh Peninsula, in the Macgillycuddy's Reeks of southwest Ireland.
What range is it part of? It belongs to Macgillycuddy's Reeks, where it is the highest of the 48 named peaks.
What are the nearest peaks? Close neighbours include Na Cnamha to the north-west, Beenkeragh to the north and Caher to the south-west.
Is there water on the way to Carrauntoohil? The mountain is steep and exposed, so you should carry your own water; for a day on this terrain, plan on about 1.5-3 litres depending on heat and route length.
How long does it take to climb Carrauntoohil? The Devil's Ladder route from Cronin's Yard is commonly a 4-6 hour round trip.
Is mobile phone coverage reliable? Coverage on the mountain is patchy and unreliable, especially in gullies and behind ridges. 112 will reach emergency services over any available network, and you should download maps before you go.
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