The rath, a ringfort of the type once used across Ireland as a defended farmstead enclosure, sits on the crest of an east to west ridge at Kilmurry Beg, and the ridge itself has become part of the structure. The natural slope of the land falls away steeply to the north-east and south, so the builders had less earthwork to do on those sides; the scarp, the stepped earthen bank that defines the enclosure, merges with the topography until it is difficult to say where deliberate construction ends and natural ground begins.

The raised circular area measures around twenty metres across. At its western side, the external scarp face rises to about 1.8 metres and incorporates a noticeable quantity of stone in its outer surface, giving that section a more deliberately built character than the rest. The interior has a slightly domed profile along the east to west axis, again partly a product of the ridge beneath it, and there is a drop in ground level towards the north-east. Identifying the original entrance is not straightforward. There is a low gap in the scarp at the south-west, which might be an entrance or might simply be wear, but a broader, shallower section of bank at the north-east, opening onto the level top of the ridge, is considered a more plausible candidate for where people and livestock once passed in and out. Roughly ninety metres to the west lies a separate embanked enclosure, suggesting this part of the ridge was a place of some sustained activity.

The base of the ridge slope immediately to the south-east has been quarried away to make room for a slatted shed and farmyard, removing whatever evidence may once have existed there. The rath itself survives in pasture, with wide views southward over rolling grassland, the kind of open prospect that would have made the site easy to watch and difficult to approach unnoticed.