Bourley and Long Valley is a 823.5-hectare (2,035-acre) biological Site of Special Scientific Interest between Fleet and Aldershot in Hampshire.

[1][2] It is part of Thames Basin Heaths Special Protection Area for the conservation of wild birds.

[3] This site has varied habitats, with heath, woodland, scrub, mire and grassland.

There is a rich invertebrate fauna, including the nationally scarce Eumenes coarctatus potter wasp, silver-studded blue butterfly and downy emerald dragonfly.

[4] Part of the area designated as Bourley and Long Valley SSSI is owned by the Ministry of Defence.