 The mountain's two main corries are major gathering grounds for Scottish rivers.To the north Coire nan Eun is the source of the River Affric which eventually finds its way to the Beauly Firth, while to the south Coire na Cadha supplies much of the water for the hydro reservoir of Loch Cluanie, eventually reaching the Moray Firth via the River Moriston and Loch Ness.Ascents of Aonach Meadhoin are usually started from the Cluanie Inn on the A87 road.