Bowerchalke Downs (grid reference SU004218) (also known as Woodminton, Marleycombe Down and Knowle Down), is a 128.6 hectare biological Site of Special Scientific Interest in Wiltshire, notified in 1971. The downs encompass the entire southern outlook of the village of Bowerchalke in the Salisbury district of Wiltshire, England, and are adjacent to both the Hampshire and Dorset county boundaries.