An Ruadh-stac reaches a height of 892 metres (2926 feet) making it the 30th highest Corbett, it also qualifies as a Marilyn. It is a distinguished looking mountain which is prominent in views because of its light grey coloured quartzite rocks, it stands in the ancient Coulin hunting forest, an area of rough mountainous country between Glen Carron and Glen Torridon. The mountain is situated four km from the nearest public road but there are good stalkers paths within the deer forest which aid access to the foot of the mountain. An Ruadh-stac is closely associated with the adjoining Munro of Maol Cheann-dearg with which it is often climbed.