Black Park is a country park in Wexham, Buckinghamshire, England to the north of the A412 road. It is managed by Buckinghamshire Council, formerly County Council. It has an area of 250 hectares, of which two separate areas totalling 15.7 hectares have been designated a biological Site of Special Scientific Interest. and a larger area of 66 hectares is …Black Park is a country park in Wexham, Buckinghamshire, England to the north of the A412 road. It is managed by Buckinghamshire Council, formerly County Council. It has an area of 250 hectares, of which two separate areas totalling 15.7 hectares have been designated a biological Site of Special Scientific Interest. and a larger area of 66 hectares is a local nature reserve.