It measures roughly 5.5 metres east to west and 2.6 metres north to south, rising just 0.6 metres above the surrounding ground. Its opening, about 1.4 metres wide, faces north, and its north-eastern arm has been gradually worn away by the water running alongside it. There is nothing to announce it to a passing walker; it looks, at first glance, like little more than a slight rise in the hillside.

What the mound contains is burnt and fire-cracked stone, the accumulated debris of a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland. The usual interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil; the cracked, heat-shattered stones were then discarded into a mound around the trough, building up over repeated use into exactly the kind of low, horseshoe-shaped form visible here. Most fulachtaí fia date from the Bronze Age, roughly 1500 to 500 BC, though the form persisted in some areas beyond that period. A relict field boundary, now largely dissolved into the landscape, skirts the eastern arc of the mound, hinting at later land use overlapping with the ancient site. Notably, this is not an isolated feature: a second fulacht fia of the same type lies just 130 metres to the east, suggesting that this stretch of hillside saw repeated or sustained activity over time.