FATMAP difficulty grade
At only 200m off an "Everesting" in ascent and at two and a bit marathons on rugged and remote terrain this one requires extensive training, planning and experience.
Preferably done on a good weather day in late May or June to avoid snow underfoot and have daylight on your side.
Starting and finishing from the Glen Nevis Youth Hostel and returning within 24 hours. Support/drop bags best given at East side Loch Eilde Mor (on foot or bike from Mamore Hotel, Kinlochleven), the tip of Loch Treig at Fersit Dam and the Bealach between Aonach Mor and Carn Mor Dearg. A Tranter's round cuts the distance to under 40 miles by shortening the route and traversing from Stob Ban to Sgurr Eilde Mor or vice versa depending whether you go clockwise or CCW.