A mountain rising to a height of 1047m (3434 feet) to the northeast of Tyndrum on the border between Perth and Kinross and Stirling, Creag Mhor lies within the Forest of Mamlorn. Its summit is formed at the apex of three distinct ridges, two of which enclose Coire Cheathaich at the head of Glen Lochay. Its name is derived from the Gaelic for 'big rock'.