Most ringforts, which are circular enclosed farmsteads built largely during the early medieval period, consist of a single bank and ditch surrounding a domestic interior. This one has two concentric earthen banks separated by a fosse, a ditch dug to create the bank material, plus an additional external fosse on the outer side. That alone would mark it out. But set within the interior, partially overlapping the line of the eastern bank, is a second, smaller circular enclosure, roughly nine metres across, whose interior sits lower than the surrounding ground. An opening in its eastern bank leads down into a circular depression in the intervening fosse, with dumped material heaped on its northern and southern sides. The function of this inner feature is not explained by its form alone, and that ambiguity gives the site a quietly puzzling character.

The ringfort sits in pasture on a break in a south-east-facing slope within the demesne of Castlecor House. Its overall diameter is just under forty metres. The inner bank stands up to 1.3 metres on its exterior face, the outer bank is broad-based and flat-topped, reaching about a metre on both faces, and the external fosse, though only around half a metre deep, survives along much of its circuit from south-south-west around to the north, though heavily overgrown. Gaps in the inner bank to the east-south-east and south-west, each about 1.6 metres wide, may represent original entrances or later breaks. The enclosure as a whole has been planted with coniferous trees, which now define the space as much as the earthworks themselves do, giving the interior a closed, sheltered quality quite different from how it would once have sat open in an agricultural landscape.