Gerrards Cross is a town and civil parish in Buckinghamshire, England. It lies immediately south of Chalfont St Peter and a short distance west of the London Borough of Hillingdon, from which it is separated by the parish of Denham. Other neighbouring villages include Fulmer, Hedgerley, Iver Heath and Stoke Poges. It is 19 miles (31 km) west-north-west of central London. The town stands on the lower slopes of the Chiltern Hills, and the River Misbourne flows through the parish, north-east of the town. Bulstrode Park Camp was an Iron Age fortified encampment. The town is close to M25 motorway and the M40 motorway, the latter running beside woodland on the town's southern boundary.