Cuillin Hills

The only Munro in Scotland that requires a rope to summit sits in the Cuillin of Skye. The Inaccessible Pinnacle is a blade of gabbro on the summit of Sgurr Dearg, and reaching the top demands a short but genuine rock climb: Moderate standard on the East Ridge, which is the route used in around 95 percent of ascents. On a dry day with a qualified guide, it is achievable by people with no prior climbing experience. In the rain, which arrives without warning in these hills, the same route becomes a serious undertaking. That unpredictability is the defining quality of the Black Cuillin.

The Rock and What Made It

The Black Cuillin are the eroded roots of a magma chamber that formed roughly 60 million years ago, during the same period of volcanic activity that opened the North Atlantic. What remains is gabbro: a dark, slow-cooled igneous rock with large crystals that give it a coarse texture and exceptional grip. This is why the Black Cuillin are so highly regarded by rock climbers. Even wet gabbro holds better than most dry rock. The exception is the bands of basalt that cut through the range in places, which can become treacherously smooth in wet conditions.

The Red Cuillin, the smoother, rounder hills to the east of Sligachan, are composed of granite from a later intrusion. Granite erodes more uniformly than gabbro, which is why the Red Hills have those rounded profiles while the Black Cuillin bristle with sharp ridges and pinnacles. The contrast between the two ranges, visible from the A87 as you approach Sligachan, is one of the more dramatic roadside geological displays in Britain.

The name itself is contested. One derivation traces it to the Old Norse kjölen, meaning the keel of a ship, an image that suits the serrated Black Cuillin ridge viewed from the south. Another links it to the Gaelic cuilionn, meaning holly, in reference to the jagged, spiky outline. A third connects it to the hero Cuchullin of Irish mythology, who was said to have trained under the warrior-queen Scathach on Skye. None of these is definitively correct.

The Ridge

The Black Cuillin main ridge runs roughly five miles from Sgurr nan Gillean in the north to Gars-bheinn in the south, with twelve Munros along its length and the Inaccessible Pinnacle adding a thirteenth for those who qualify it separately. A complete traverse of the ridge is considered one of the great mountaineering challenges in Britain. It requires competence in Grade 3 scrambling, roped sections on multiple peaks, and either good bivouac skills or an exceptionally long summer day. Most parties completing the full traverse either camp on the ridge or start before dawn from Glenbrittle.

For those not pursuing the full ridge, individual peaks within the range offer routes of varying difficulty. Sgurr nan Gillean is the most northerly and one of the most recognisable peaks from the road; its Tourist Route involves serious scrambling in the upper section. Sgurr Alasdair, the highest point in the Cuillin at 992 metres, is reached via the Great Stone Chute from Coire Lagan. Both routes are well-documented on Walkhighlands and require appropriate footwear and navigation skills.

The Fairy Pools and Coire Lagan

For visitors not attempting the main ridge, the Fairy Pools near Carbost are the single most visited natural feature in the Cuillin area. The pools are a series of waterfalls and clear blue-green swimming holes on the Allt Coir’ a’ Mhadaidh, reached by a well-maintained path from the car park at Baile Mor. On summer weekends the path is busy from mid-morning onwards. Arriving before 8am gives you the pools largely to yourself and the light on the Cuillin above is better at that hour.

Coire Lagan is the more rewarding objective for walkers who want a serious day without technical climbing. The route from Glenbrittle climbs to a high corrie with a lochan and the slabs below Sron na Ciche. It is a full day out and the upper section involves some rough terrain, but no roping is required in dry conditions.

Guides and Safety

Skye Guides and several other IFMGA-certified operations based on the island offer guided ascents of the Inaccessible Pinnacle, multi-day ridge traverses, and introductory scrambling days on the easier Cuillin peaks. If you want to climb any of the technical routes without prior scrambling experience, hiring a guide is not optional, it is necessary. The mountain rescue team on Skye is one of the busiest in Scotland, and a disproportionate number of call-outs involve walkers who underestimated the terrain.

The Cuillin has a documented effect on compass bearings. The gabbro contains sufficient magnetite to deflect magnetic compasses, sometimes by several degrees. This is not a theoretical concern: navigation by compass alone on the ridge in low visibility is unreliable. GPS devices or thorough pre-planned route knowledge are the practical mitigation.

Where to Stay

Glenbrittle campsite, run by the Forestry Commission at the foot of the Black Cuillin, is the best base for climbers and serious walkers. The site is basic, exposed to weather, and fills quickly in summer. Glenbrittle Youth Hostel is nearby and offers bunk accommodation for those who prefer a roof. Book both well in advance for July and August.

The Sligachan Hotel at the junction of the A87 and A863 has been a base for Cuillin climbers since it opened in 1830. Seumas’ Bar at the hotel holds over 400 whiskies, was a finalist for SLTN Whisky Bar of the Year in 2025, and is the standard post-climb destination for those coming off the northern peaks. Rooms here sit in a mid-range price band and the hotel’s location at the foot of the Red and Black Cuillin makes it the most practically convenient base on the island.

In Portree, the Cuillin Hills Hotel overlooks the bay and has an award-winning restaurant. It is a four-star property with rooms running from around 250 to 450 pounds per night depending on season. For those wanting luxury without Portree’s tourist traffic, the Duisdale House Hotel in Sleat on the southern peninsula is quieter and well-reviewed.

The Old Inn at Carbost sits on the shore of Loch Harport with views toward the Cuillin. It offers bed and breakfast rooms, a bunkhouse sleeping up to 24, and an on-site bar that is the closest thing to a local pub for the Glenbrittle approach. The food is straightforward and well-suited to post-mountain hunger. The attached Talisker Distillery visitor centre is a two-minute walk away and worth an hour, particularly the guided tour that covers the distillery’s role in the Scotch whisky trade since 1830.

Getting There

The Isle of Skye is connected to the mainland by the Skye Bridge from Kyle of Lochalsh, a toll-free crossing since 2004. Inverness is roughly 110 miles by road; Glasgow is around 200 miles. Scottish Citylink operates coaches from both cities. Once on the island, having a car is strongly advisable. The island’s bus network runs between the main settlements but does not reach Glenbrittle, and the timing is incompatible with alpine starts for ridge climbing.

The nearest train stations are Kyle of Lochalsh on the Kyle Line from Inverness, and Achnasheen further east. Reaching Glenbrittle by public transport from these stations requires a taxi or a combination of the limited Skye bus services and a long walk.

Weather and Timing

The Cuillin generates its own weather. The ridge sits directly in the path of Atlantic fronts, and conditions change rapidly and without much warning. June and September are statistically the driest months on Skye, though neither guarantees settled weather. July and August bring the most visitors and, paradoxically, are not notably drier than May or early June. The midges are at their worst in July and August; a head net is not optional during still, damp evenings near the campsite.

If your primary goal is climbing the Inaccessible Pinnacle or traversing part of the main ridge, booking a guide for three or four days rather than one gives you the flexibility to wait for a suitable weather window rather than committing to a specific date that may arrive in cloud and horizontal rain.

The Fairy Pools Alternative: Brittle River Walk

For a crowd-free alternative to the Fairy Pools circuit, the path along the River Brittle from Glenbrittle beach to the lower corrie gives similar scenery without the car park queues. It is not signposted and appears on no tourist map, which is why it remains quiet. Start from the beach at Glenbrittle and follow the river south.

The Cuillin is the kind of place that rewards experience and punishes complacency. It is also, on a clear day with the right company and the right conditions, as good as mountain terrain gets in Britain. Glenbrittle campsite on a calm June evening, with the Black Cuillin silhouetted against a late northern sky, is not something that wears off.