The approach from the west starts at Auch (grid reference ) on the A82 and goes under the viaduct of the West Highland Line, then SE up Glen Coralan and over the Corbett of Cam Chreag to reach Creag Mhòr. If continuing to Beinn Heasgarnich from the summit, a direct line NE is not recommended because the hillside is steep and rocky, instead use the north ridge as mentioned before heading east to the col between the two mountains to avoid dangerous ground.