Beinn nan Lus is a Graham of 709 m in Argyll and Bute. It sits below Beinn nan Aighenan, only 3.5 km to the north-east and 250 m higher.
On the Grahams height ladder it sits between Beinn Dearg Mhor (Highland, NG587228) (709.3 m) and Beinn a' Mhanaich (708.8 m). The higher hill nearest to it, Beinn nan Aighenan, is a Munro, 3.5 km to the north-east.