Càrn Gorm · Meall Garbh (Càrn Mairg) · Càrn Mairg · Creag Mhòr (Meall na Aighean)
Glen Lyon Horseshoe
Route overview
A classic, high-level circuit of four Munros on the north side of beautiful Glen Lyon. This horseshoe walk traverses broad grassy ridges, stony plateaus, and the rocky peak of Càrn Mairg, offering expansive views across Perthshire, Rannoch Moor, and the Ben Lawers range.
Terrain and underfoot
The route follows estate tracks and clear mountain paths, with old fence posts providing a useful navigational aid across the high plateaus. Underfoot conditions are generally straightforward, though the ascent of Càrn Gorm and the final descent are steep. The summit of Càrn Mairg is notably rocky, requiring care over boulder-strewn ground and near craggy edges in poor visibility.
- Distance
- 18.1 km
- Ascent
- 1,344 m
- Typical time
- 6 - 7.5 hoursStandard moving time
- Your time
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- 4
Getting there and parking
Driving and parking
Invervar, Carn Mairg car park and western layby lead
The south-side hillwalkers car park at Invervar, grid NN666482, is open seasonally. Check availability before travelling.
- Before you go
- Mountaineering Scotland’s August 2026 advice supports the established ridge circuit and avoiding corries except in emergencies. Check current access advice.
- If it is full
- The road is a Clearway. If the car park is closed or full, choose another starting point rather than parking on the road.