Castle Ditches is the site of an Iron Age trivallate hillfort in the southeast of Tisbury parish in Wiltshire, England. It is probable that its ancient name was Spelsbury; it was referred to as Willburge in Tisbury's charter of 984 A.D. Its shape is roughly triangular, and follows the contours of the small hill upon which it sits. The earthworks comprise a triple row of ramparts and ditches, now covered on three sides by woodland. There is a large entrance towards the southeast, where there is the shallowest incline of the hill; but there is also a narrow slit on the opposite side. The area within the site encompasses nearly , and the greatest height of the ramparts is about . Castle Ditches was recorded as a Scheduled Monument in 1932. Location The site is at , about southeast of Tisbury village. The hill has a summit of 193m AOD and overlooks the valley of the River Nadder to the north. Public footpaths surround the site, but the land is privately owned. See also List of hill forts in England References Iron Age sites in England Hill forts in Wiltshire Archaeological sites in Wiltshire Scheduled monuments in Wiltshire