Gairich has two notable corries on its slopes. Coire Liath lies on the northern flank of the mountain. It is a kilometre across and is rimmed by crags. It is drained by the Allt a' Choire Leith which flows northwards into Loch Quoich. These lower northern slopes of the mountain formerly had a right of way which went along the southern shore of Loch Quoich, this track was submerged and lost when the loch was dammed in 1957 and the water level was raised by 100 feet as part of the hydro-electric scheme in the Highlands. Lochan Doire Meall an Eilein, a small lake approximately 500 metres in length stands on the northern flanks of Gairich around the 400 metre contour. The eastern slopes of the mountain has the smaller Coire Thollaidh which also drains north into the loch. Gairich is made up of three distinct ridges, the NE and NW ridges form the flanks of Coire Liath and descend to Loch Quoich. Either of these ridges could be used for ascent by walkers approaching the mountain by canoe across the loch. The eastern ridge descends for four kilometres from the summit ending near the Quoich dam and is used in ascending the mountain from that direction.