Leana Mhor is a Graham of 683.9 m in Highland. It sits below Beinn Iaruinn, only 2.5 km to the north-east and 120.4 m higher.
All four of its nearest neighbours lie to the east, so it stands at the western edge of its group. On the Grahams height ladder it sits between Beinn Damhain (684.2 m) and Cruach an t-Sidhein (683.6 m). The higher hill nearest to it, Beinn Iaruinn, is a Corbett, 2.5 km to the north-east. It falls on two OS 1:50,000 sheets, 34 and 41.