It measures roughly 34 metres across, and the ground inside has been deliberately cut away on the south-western side, an act of careful levelling carried out to counteract the natural slope of the hill. That kind of deliberate shaping, done entirely by hand with whatever tools were available, points to a place that once mattered to the people who made it.

The feature is a ringfort, or at least a structure of that type, a form of enclosed settlement that was widespread in Ireland from the early medieval period onward. A ringfort typically consists of a circular area defined by an earthen bank and an accompanying ditch, and this example follows that pattern closely. The surrounding fosse, which is simply the ditch or trench dug to create the enclosure, runs to about 1.1 metres in depth, and the outer earthen bank rises to the same height on the south-western to south-eastern arc. By 1842, when the Ordnance Survey produced its six-inch maps of Ireland, the enclosure was already being recorded using hachures, the small radiating lines cartographers used to indicate an earthwork or raised feature. That it appeared on the map at all suggests it was still distinct enough to catch a surveyor's eye, sitting on its hilltop in what was, and apparently still is, grazing land.