The reserve is 23 hectares (57 acres), of which 20.36 hectares (50.3 acres) is SSSI.[2][4] The area of the national nature reserve which is a SSSI is part of the much bigger SSSI of Ashford Hill Woods and Meadows which is 142.1 hectares (351 acres) in size.[2]
The reserve is a series of low-lying meadows in the valley of a small stream and also features woodland areas.[5] The meadows area mix of London Clay and Bagshot beds.[2]
The stream is called Baughurst Brook and eventually drains into the River Enborne.[3]
History
The wooded areas are believed to be part of the medieval royal forest of Pamber.[6]