Great Calva appears from Skiddaw Forest as a steep sided pyramid, clad predominantly in heather. The summit is a curving ridge half a mile long, with Great Calva at the eastern end and Little Calva to the west. The ridge itself is extremely wet underfoot. From between the two tops, Dead Beck runs down into Candleseaves Bog, the source of both the Caldew and Dash Beck. Great Calva has a prominent southern spur, around which the Caldew flows before steering north east for the Eden Valley. In a strict topographical sense Candleseaves Bog is the connection between Great Calva and Skiddaw, but it could hardly be described as a ridge route.