An oval patch of earth, modest in scale and easy to overlook from any distance, is ringed by a combination of scarped edges, a shallow outer ditch, and a low external bank. None of these features rises much above the surrounding field. The whole thing could be mistaken for a natural irregularity in the land, and in places it very nearly has been lost to just that kind of gradual erasure.

The enclosure at Cloonreask measures roughly eight metres east to west and four and a half metres north to south. A scarped edge, essentially a deliberate cut into the ground forming a low vertical or near-vertical face, defines the interior, standing about half a metre high and some four metres wide. Beyond that sits a fosse, the term used for an earthwork ditch, shallow here at around fifteen centimetres deep and four metres across, running from the south-east around to the north-east. A separate external bank, reaching about twenty centimetres in height and two metres wide, extends from the south-south-west to the north-east. What this combination of features once enclosed, or who built it and when, the surviving record does not say. The site was documented by Denis Power and uploaded to the record in August 2011, but no period or function has been formally assigned to it.

The outer bank shows signs of having been quarried at some point, particularly to the north-west, and this interference has left a series of low undulations running around the perimeter. Those ripples in the turf are now among the most visible clues that something deliberate was once constructed here. Visiting requires attention to ground level rather than to any dramatic skyline feature. The site sits in working pasture, so access would depend on landowner permission, and the best conditions for reading the earthworks are likely on a dry day when low sunlight rakes across the surface at an angle, throwing the shallow banks and hollows into relief.