It is roughly twenty-four metres across, defined by a round-topped earthen bank and an outer fosse, which is the ditch that would originally have reinforced the enclosure's defences. Where the bank has survived best, along the east, west, and northern arc, it still rises to nearly a metre on the outside. Elsewhere it has been worn down to a simple scarp, a low abrupt edge in the turf. The fosse itself, a modest hollow no more than thirty centimetres deep at its base, can be traced on the south-western to north-western side; elsewhere, its path is betrayed only by a band of noticeably lusher vegetation, the kind of subtle sign that rewards anyone paying close attention to the ground underfoot.

The most intriguing detail lies inside the enclosure. A depression runs from somewhere near the centre outward toward the southern edge, roughly nine and a half metres long and up to forty centimetres deep. It is tentatively identified as a collapsed souterrain, an underground stone-lined passage of the sort built during the early medieval period, typically used for storage or as a place of refuge. If that identification is correct, it suggests the fort was not merely a stock enclosure or a territorial marker but a settlement with some degree of permanence, inhabited by people who had reason to conceal or protect their stores. The entrance, four metres wide, faces east. The valley below, running on a north-west to south-east axis, would have been visible from this position, which may well be why the site was chosen.