The area is more elevated compared to the rest of the county of Berkshire and the district. It is undulating and has the main source of the Enborne. It has a border to the south with Hampshire and is centred west south-west of Newbury, between Inkpen and Ball Hill. The eastern slopes of Walbury Hill, the highest point in South East England fall within its bounds as is the adjoining West Woodhay Down, a Site of Special Scientific Interest.