Set on an east-facing slope of a northeast-to-southwest ridge, this ancient enclosure was not discovered by anyone walking the ground but by someone studying aerial photographs taken in April 1974. From the air, the circular outline was legible enough to be recorded; at ground level, centuries of weathering and agricultural use have reduced it to something you might easily read as natural undulation.

The enclosure, roughly 55 metres across on its northwest-to-southeast axis and 37 metres east to west, would once have been defined by the full circuit of a scarp, a fosse (a shallow ditch), and an external bank. Today those features survive in any meaningful form only on the western side. The scarp rises just 0.65 metres, the fosse is barely 10 centimetres deep, and the external bank reaches no more than 15 centimetres above the surrounding ground. On the eastern side, the builders appear to have done what was practical rather than laborious: the natural fall of the ridge itself was pressed into service as the enclosing edge. A field boundary, presumably of much later date, cuts across the possible external bank at the southern quadrant, a reminder that farmland has been continuously reshaping these features long after their original purpose was forgotten. Enclosures of this type, circular ditched areas that once defined a settlement, a farmstead, or a place of ritual, are among the most common and least understood monument types in the Irish landscape, and the degraded condition of this one is entirely typical of what happens when an earthwork is left to absorb several millennia of ordinary agricultural life.