This parish is a salient of Hertfordshire jutting northwards into Bedfordshire. The southern half of the parish is part of the chalky downs of the Chiltern Hills, which are covered with short turf and plantations of fir trees. The hills end abruptly and close to their foot lies the village of Hexton. It stands among grass fields and orchards at the beginning of a low plain, which, sloping gradually to the north, becomes merged in the large plain of southern Bedfordshire. The southern boundary of the parish is the grassy Icknield Way.