Folkestone to Etchinghill Escarpment is a 263.2-hectare (650-acre) biological and geological Site of Special Scientific Interest on the northern outskirts of Folkestone in Kent. It is a Special Area of Conservation. An area of 205 hectares (510 acres) is a Nature Conservation Review grassland site, Grade 2, and the 70-hectare (170-acre) Asholt Wood at its western end is a Grade 1 woodland site. The reserve has a Geological Conservation Review site.

A large area of chalk grassland has three nationally rare plants, and Asholt Wood has outstanding lichen flora. The site also includes Holywell Coombe, a key geological site displaying the sequence of mollusc fossils in the late Pleistocene and Holocene.