Cranstackie is a mountain of 801 m in Sutherland

Sutherland

Sutherland is a registration county, lieutenancy area and historic administrative county of Scotland. It is now within the Highland local government area. In Gaelic the area is referred to according to its traditional areas: Dùthaich 'IcAoidh , Asainte , and Cataibh...

, the northwestern tip of the Scottish

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 Highlands

Scottish Highlands

The Highlands is an historic region of Scotland. The area is sometimes referred to as the "Scottish Highlands". It was culturally distinguishable from the Lowlands from the later Middle Ages into the modern period, when Lowland Scots replaced Scottish Gaelic throughout most of the Lowlands...

. It is a Corbett located west of Loch Eriboll

Loch Eriboll

Loch Eriboll is a long sea loch on the north coast of Scotland, which has been used for centuries as a deep water anchorage as it is safe from the often stormy seas of Cape Wrath and the Pentland Firth...

 and northeast of Foinaven

Foinaven

Foinaven is a mountain in Scotland, situated in the far north-west corner of the Scottish Highlands. Like many of the monolithic mountains that surround it, the mountain is within the Moine Thrust Belt and is made up of imbricated layers of Cambrian quartzite which overlie the older Lewisian...

. Like Foinaven and Beinn Spionnaidh

Beinn Spionnaidh

Beinn Spionnaidh is a mountain of 773 m in Sutherland, the northwestern tip of the Scottish Highlands. It is a Corbett located west of Loch Eriboll and northeast of Cranstackie and Foinaven. It is like its neighbours in that the top, a 1 km long whaleback running southwest to northeast,...

 to the northeast, its top is covered with loose, broken quartzite

Quartzite

Quartzite is a hard metamorphic rock which was originally sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to gray, though quartzites often occur in various shades of pink...

. The slope is much steeper on the west side than the east, but neither approach is easy due to the covering of loose rock.