Hambledon Hill is a hill fort owned by National Trust, located in the Blackmore Vale, in the county of Dorset, England. It is a chalk outcrop, isolated from the Dorset Downs via the River Stour. it is a National Nature Reserve with common plants including milkwort, salad burnet, pyramidal orchid and wild thyme. With its neighbours, Hod Hill and Bulbarrow, offers views over Blackmore Vale and the chalk ridges of Cranborne Chase. This hill is the first in a series of Iron Age earthworks, which continues with Hod Hill, Spetisbury Rings, Buzbury Rings, Badbury Rings and Dudsburry Camp.