These enclosures, sometimes associated with early medieval settlement or farming activity, were formed by raising a bank of earth around a defined area, often with a fosse, or ditch, cut along the outside to provide the material. What makes this one quietly interesting is the geometry: three sides run straight, while the southern arc bends in a continuous curve, giving the whole enclosure an asymmetrical, almost organic shape that does not quite fit the tidier forms seen elsewhere.

The enclosure measures roughly 37.5 metres north to south and 54.2 metres east to west, making it a substantial area, though the bank itself, at around 0.7 metres high, is modest. The external fosse, reaching about half a metre in depth, runs from the north-northwest to the southeast. On the eastern side, a causeway, a raised strip of ground left uncut when the fosse was dug, marks the original entrance, which is some 3.1 metres wide. A later stone field fence has been built across the western bank, overlaying the older earthwork and folding it into the ordinary agricultural infrastructure of the region. The site was recorded as part of a 1994 archaeological survey of the Ballinrobe district compiled by D. Lavelle for the Lough Mask and Lough Carra Tourist Development Association.