At its centre, stones have been removed over time, leaving a long hollow where a limestone outcrop now sits exposed to the open sky. The result is something that reads less like a monument and more like an interrupted thought, a structure partially dismantled, its interior revealed not by archaeologists but by whoever, over the centuries, found the stones useful for other purposes.

The cairn is oval in plan, measuring roughly 8.3 metres by 7.3 metres, and standing just over a metre high. A cairn of this kind is typically a mound of stones raised over a burial or used to mark a significant place in the prehistoric landscape, and examples are scattered across the uplands of Connacht. What sets this one apart is the hollow at its heart, stretching nearly the full length of the mound at 7.8 metres, and the limestone outcrop that the removal of material has brought into view. Whether that outcrop played any role in the original choice of location is unknown, but its presence gives the site an accidental quality, as though the hill itself is showing through a gap in its own covering. Kesh Corann is a hill already associated with mythology and early history in the Sligo region, and the spur on which this cairn sits would have offered a commanding view of the surrounding terrain.