Meall Glas comprises mainly rolling grassy slopes, with two main ridges. The north west ridge drops from the summit to Glen Lochay and can be used as an ascent route. The other ridge curves east round the lip of Coire Cheathaich, passing over an unnamed top at 908m before swinging north east to the Munro Top of Beinn Cheathaich (937 metres), 1.5 km from the main peak. In Sir Hugh Munro's original tables of 1891, Beinn Cheathaich was listed as the Munro with Meall Glas as the Top, an error rectified in the 1921 revision. From Beinn Cheathaich the ridge swings north and drops to Glen Lochay. Broad slopes to the east descend to the Lairig a' Churain (609 metres) which connects to the adjacent Munro of Sgiath Chuil.