It measures roughly 7.7 metres across, with a slight hollow at its centre, and only where grazing livestock have worn the surface away does its true character become visible: fragments of burnt stone and charcoal, the signature material of a fulacht fia.

A fulacht fia is a prehistoric cooking site, typically consisting of a horseshoe-shaped mound of fire-cracked stones accumulated beside a water trough dug into the ground. The usual method involved heating stones in a fire and dropping them into a water-filled trough to bring it to a boil, cooking meat or, as some researchers have proposed, serving other functions entirely. The slight central depression at this site may mark the position of just such a trough, now long since silted and settled. These monuments are among the most common prehistoric features in the Irish landscape, found especially in low-lying and marshy terrain, and this corner of Mayo is no exception. A second burnt mound lies roughly 65 metres to the south-east, suggesting the area saw repeated or sustained activity over time. A short distance beyond that, approximately 100 metres to the south-east, stands Rathnaguppaun Castle, a tower house, a later medieval structure of an entirely different era and purpose, though its proximity hints at a landscape that has drawn human settlement across many centuries.