What makes it particularly odd is its position: rather than commanding high ground, as many Irish earthworks do, it occupies a depression in the landscape, the roughly circular platform sitting down inside the hollow rather than rising above it.

The structure is composed of several distinct elements. A roughly circular platform, measuring approximately 16 metres north to south and 18 metres east to west, is defined by a gently sloping scarp, a cut or shaped face of earth. Around this runs a fosse, the term for a defensive or enclosing ditch, about 4.5 metres wide, and beyond that a counterscarp bank, the raised outer lip of the ditch, which stands nearly two metres high. A berm, a flat ledge of ground between the ditch and the outer bank, runs between 7 and 10 metres wide. The interior of the platform is now heavily overgrown with scrub, which obscures whatever surface detail may remain. One detail that adds a layer of administrative history is that the counterscarp bank was incorporated into a barony boundary along its northern and eastern sides; barony boundaries in Ireland are medieval administrative divisions, often fossilised in the landscape long after their practical function disappeared, and their alignment here with the earthwork suggests the structure was already a recognised feature when those boundaries were fixed.