Ben Macdui (Beinn MacDuibh) stands at 1,309 metres on the great Cairngorm plateau — the second-highest summit in Britain and one of its most serious hill days. Unlike a sharp peak, Macdui is a broad, bouldery dome on an immense high plateau with a genuine sub-arctic feel, and the summit carries the old legend of the Am Fear Liath Mòr, the Grey Man. This is demanding, remote walking where weather and navigation matter more than fitness alone.
Getting there and route options
The shortest approach starts from the Cairn Gorm ski-centre car park at Coire Cas (about 650m), heading south across the plateau via the Fiacaill ridge and Lochan Buidhe — roughly 17km with around 930m of ascent as an out-and-back. The classic long day starts from Linn of Dee near Braemar, walking up Glen Lui past Derry Lodge and Bob Scott’s Bothy, then climbing via the Sròn Riach ridge — a much bigger undertaking of 27km-plus. Longer circuits link Macdui with Cairn Toul, Braeriach, Derry Cairngorm, and the dramatic Lairig Ghru pass. Many walkers cycle part of the Glen Lui approach on mountain bikes to shorten the day.
Navigation and weather
This is the crux of Ben Macdui. The plateau is featureless in mist, and paths can be hard to follow in poor visibility — a safe ascent genuinely requires map, compass, and the skill to use them. A GPS unit or phone with offline maps is a good backup, not a primary tool. Check the mountain forecast the night before and the morning of; the summit is brutally exposed, with dangerous windchill even in summer, and there is no substantial shelter up top. If cloud drops and the wind rises, turn back without hesitation. Winter transforms the plateau into a full mountaineering environment requiring axe and crampons.
Best time to hike
April through October is the normal walking season, with the longest days from May to August. Even midsummer can bring cold, wet, and windy conditions, so go prepared for winter-like weather at any time of year. Midges can be fierce in the glens on calm, damp evenings from June to September — less of an issue on the high plateau itself. Winter ascents are for experienced winter mountaineers only.
Costs and logistics
There are no permits and no fees for the hill itself; the only costs are transport, the ski-centre car park charge, food, and gear. Bothies such as Bob Scott’s and Corrour are free, open shelters maintained for public use — carry everything you need and leave them clean. The nearest towns with accommodation and supplies are Aviemore on the Speyside side and Braemar on the Deeside side; book ahead in summer weekends.
Practical tips
Carry full waterproofs, warm layers, hat and gloves whatever the forecast promises, plus plenty of food and water — there is none on the plateau. Sturdy waterproof boots are essential for the boulder fields and boggy glen sections. Tell someone your route and expected return time; phone signal is unreliable on the plateau. On the descent from the ski-centre side, be careful not to drift onto paths toward Cairn Gorm or Loch Etchachan in mist — confirm your bearing before committing. And keep an eye out for ptarmigan, dotterel, and snow buntings, the plateau’s hardy specialists.
Arjun Mehta is the pen name behind Mountains Bliss — practical mountain-travel guides with routes, costs, seasons and safety notes, researched from real trekker discussions and cross-checked before publishing. No sponsored posts, ever.
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