 The ascent of Sgùrr nan Ceathreamhnan is a major undertaking best done during the long hours of summer daylight.The shortest approach is from the Alltbeithe youth hostel in upper Glen Affric at grid reference 3.5 kilometres south of the summit; however, it is a major undertaking just to get to the hostel, with long walks in from Loch Cluanie to the south or from the road end in Glen Affric.It is also possible to start walking from Iron Lodge in Glen Elchaig but a bicycle is needed to travel up the estate road, another approach starts from the car park in Strath Croe.