Meall Glas can be climbed from either Glen Dochart or Glen Lochay. The southern approach from Glen Dochart is the most popular because of ease of access by car. The route starts at Auchessan (grid reference ) on the A85 road and goes north across moorland to reach the summit ridge just to the east of the highest point. The northern approach starts at the road end in Glen Lochay at Kenknock (grid reference ). The route proceeds for 1.5 km west up the glen, crosses the River Lochay by a ford (the bridge no longer exists) and follows a track by the Lubchurran Burn which goes south and west and before reaching the summit via the Top of Beinn Cheathaich.