Great Calva is a fell in the Lake District, England. It is in the Northern Fells, lying roughly at the centre of this region of high ground. As a result it is distant from roads and quite remote by Lakeland standards. Great Calva stands at the head of a major geological fault running through the centre of the Lake District, and so from the summit it is possible to see all the way south over Thirlmere. The subsidiary summit of Little Calva lies to the west.
A cairn stands at the top of the south ridge with another a little to the north at the highest point. The remains of an old fence runs between the two. A few yards east of the summit a stone windshelter has been constructed. There is some rock in evidence but grass and heather predominate.The view southward, particularly from the lower cairn is unexpectedly good. Looking directly down the Glenderaterra Valley and the Vale of St John, the gap gives an unimpeded view as far as Loughrigg and Steel Fell.