It measures roughly 35 metres east to west and 42 metres north to south, rising to about 1.7 metres at its western end. The shape is smooth and regular, with a slightly flattened top that slopes away gradually on all sides, and modern field fences have been built directly against its southern, western, and northern edges, cutting into the rise and boxing it into the corner of a rectangular field. That collision of ancient landform and contemporary agricultural geometry gives the place a quietly unsettled quality.

The feature has not been firmly identified as either natural or man-made, and that ambiguity is precisely what makes it interesting. Cultivation ridges cross its surface, suggesting it has been worked at some point, and there is a shallow surface depression of about three metres in diameter on the eastern side. On its own, an oval mound in a Mayo field might easily be explained away as a natural glacial deposit or a quirk of underlying geology. But the regularity of its profile and its position in boggy, waterlogged ground have left open the possibility that it represents a wetland habitation site, meaning a place where people once raised a platform of earth or material above the surrounding wet ground in order to live or work on it. Ireland has a long tradition of such settlements, from crannogs, which are artificial islands built on lakes, to various forms of raised or defended enclosures in marginal land. Whether this mound belongs to any such tradition remains unresolved.