To the south of Great Calva, at the centre of the Northern Fells, is Skiddaw Forest. Confusingly this Forest contains no trees, —other than the windbreak of Skiddaw House — but is a marshy upland area at around 1,300 ft surrounded on all sides by higher fells. Three streams flow from Skiddaw Forest, dividing the Northern Fells into three sectors. Dash Beck runs north west, the River Caldew north east and the River Glenderaterra south. The three groups of fells can conveniently be thought of as the Skiddaw massif, the Blencathra group and Back O'Skiddaw. The single building in Skiddaw Forest is Skiddaw House which has variously seen service as a shepherds' bothy and a Youth Hostel.