Sheepleas is a 99.9-hectare (247-acre) biological and geological Site of Special Scientific Interest east of Guildford in Surrey.

[1][2] It is a Geological Conservation Review site[3] and a Local Nature Reserve.

[9] This sloping site on the North Downs has woodland, scrub and botanically rich grassland.

The diverse invertebrate fauna includes two nationally rare flies, Norellia spinipes and Microdon devius.

A cutting in Mountain Wood exposes a unique gravel Pleistocene deposit which throws light on the Quaternary history of the Weald and the evolution of the London Basin.