Ash to Brookwood Heaths

Ash to Brookwood Heaths is a 1,576.3 ha biological Site of Special Scientific Interest west of Guildford in Surrey. It is a Nature Conservation Review site, Grade I. It is part of the Thames Basin Heaths Special Protection Area and the Thursley, Ash, Pirbright and Chobham Special Area of Conservation. An area of 1,392 ha is managed as a nature reserve by the Surrey Wildlife Trust.

This site has dry heathland, wet heath and bog. Large areas have been protected from development because they are army training ranges. The site is important for mosses and liverworts and there are nationally important populations of nightjars, woodlarks, Dartford warblers and hobbies.