This is a cashel, a type of ringfort defined not by an earthen bank but by a drystone wall, and this one has held its shape well enough that its dimensions can still be measured with some precision.

The enclosure is oval, roughly 38 metres along its north-west to south-east axis and 33 metres across. Its drystone wall, built without mortar in the tradition of early medieval Irish construction, stands to an internal height of about 0.85 metres and reaches 1.55 metres on the exterior, with the greatest height at the eastern side. That asymmetry is partly explained by the lie of the land: the interior slopes downward to the north-east, and the wall would have needed more height on the lower side to maintain an effective barrier. The entrance, 2.2 metres wide, faces west-south-west, a orientation that would have offered some shelter from the prevailing weather. The whole structure sits in pasture on an east-facing slope, close to the edge of a ravine, with later field boundaries pressing up against the outer wall on three sides. Those boundaries are a reminder that the landscape around the cashel has continued to be organised and reorganised by farmers across the centuries, each generation working around the old stone ring without troubling to remove it.