Set into a north-facing slope that looks down over the Owenboy river valley, it has been levelled by centuries of tillage until what remains is little more than a shallow circular impression in the earth, its boundary marked by a low grass-covered bank rising barely 0.75 metres on the exterior. The circular area still measures roughly 29 to 30 metres across, which tells you something about its original scale, even if the drama has long since been ploughed away.

Ringforts, known in Irish as raths when their enclosures were formed from earthen banks rather than stone, were the dominant form of rural settlement in early medieval Ireland, typically dating from around the fifth to the twelfth century. They served as enclosed farmsteads, the bank and accompanying ditch providing a degree of security for a family and their livestock. The Kilmoney example retains its roughly circular plan, the surviving bank running from the east-northeast around to the north-northwest, and the interior is now level ground. The site sits in working agricultural land, which accounts for its diminished condition; repeated cultivation has gradually worn down what would once have been a more pronounced earthwork.