Stonehill Down covers an area of 20 hectares and lies high on the chalk ridge running west/east across the Isle of Purbeck with far-reaching views across the Wareham Forest, with Poole Harbour to the east. It is bounded by the line of the Purbeck Hills to the south, with the summit of Ridgeway Hill about 1 kilometre to the west-southwest, and Corfe Castle about 3 kilometres to the west.