Arbury Hill, at 225 m (738 ft), is the joint highest point in the English county of Northamptonshire.
[3] On the summit of Arbury Hill there are the vestiges of an Iron Age Fort (grid reference SP540587), although its date and origin are disputed.
It is mentioned as one of the boundary marks in a land grant of Edmund the Elder, as being the place where the three parishes of Badby, Dodford and Everdon meet.
[3] The summit of Arbury Hill was one in a series of points used for triangulation in 1784 to determine the exact diameter and magnitude of the Earth, in a sequence of measurements undertaken by the British Government.
The soil is clayey, the site is steeply sloping and there are plenty of elevation changes, some off camber turns and a few smallish jumps.