Sgùrr a' Mhadaidh (Scottish Gaelic for 'peak of the dog / fox') is a mountain peak in the Black Cuillin range on the Isle of Skye, Scotland. It is a Munro with a height of 918 metres (3,012 ft). Like the rest of the range it is composed of gabbro, a rock with excellent grip for mountaineering.

The simplest route ascends via the col of An Dorus (the Door), most easily reached from Glen Brittle. The mountain has four summits; only the highest can be reached by scramblers. The three lower summits require rock-climbing skills and equipment.