Suilven (Scottish Gaelic: Sula Bheinn) is one of the most distinctive mountains in Scotland. Lying in a remote area in the west of Sutherland, it rises almost vertically from a wilderness landscape of moorland, bogs and lochans known as Inverpolly National Nature Reserve. The mountain forms a steep-sided ridge some 2 km in length. The highest point, known as Caisteal Liath (meaning "the Grey Castle"), lies at the northwest end of this ridge.

Photo credit: Grinner