Glen Rosa is the most accessible of Arran's mountain glens, running north from Brodick into the granite peaks of the island's northern massif. The walk up the glen follows the Rosa Burn through open moorland with increasingly dramatic views of the mountains ahead — Cir Mhòr's sharp summit appearing increasingly close as the glen narrows.
The basic glen walk is about 10 kilometres return and takes three to four hours at an easy pace. Experienced walkers can continue up to the Bealach an Fhir-bhogha (the Bowman's Pass) and descend into Glen Sannox on the other side — a full day's outing through some of the finest scenery in the west of Scotland. Start from the car park off the String Road west of Brodick.