The fort is on high ground beyond and adjoining the north-east boundary of National Trust Croft Castle parkland.

The nearest settlements are the villages of Yarpole, Aymestrey and Yatton, and the hamlet of Mortimer's Cross.

The monument includes a small multivallate hillfort with an annexe containing a Romano-Celtic temple and a medieval warren of up to five pillow mounds on the summit of a prominent steeply sloping spur overlooking Yatton Marsh and the valley of a tributary to Allcock's Brook.

The enclosure originally covered approximately 2.2ha, but this increased through time to 3.6ha and eventually a southern rectangular annexe was added.

Finds included metalwork such as iron tools, weapons, sickles, blades, nails and a spade, shale and glass objects, bone and antler artefacts, spindle whorls, loom and thatch weights, saddle querns and rotary querns, hammer stones and Iron Age pottery.