A mountain of the Lochaber district of Highland Council Area, Glas Bheinn rises to 556m (1824 feet) 2 miles (3 km) south of Glen Garry and 2½ miles (4 km) southwest of Tomdoun. A number of streams rise on its flanks, which all eventually discharge into the River Garry.
This mountain should not be confused with another Glas Bheinn which lies 4 miles (6.5 km) to the southeast.