Ruadh Stac Mor is a Munro of 918.7 m in Highland. All four of its nearest neighbours are higher, up to Mullach Coire Mhic Fhearchair at 1,015.2 m.
On the Munros height ladder it sits between Gairich (918.8 m) and Sgurr a' Mhadaidh (918 m). The key col is close by, only 0.2 km to the south-west at 748.9 m. The summit is marked by a trig point.