It measures roughly eight metres by four, and would barely register as unusual were it not for what the plough occasionally turns up: burnt material, the signature residue of a fulacht fia, one of the most common and least understood monument types in the Irish landscape.

A fulacht fia, sometimes called a burnt mound, is generally interpreted as a prehistoric cooking site, though other uses including bathing, textile processing, and brewing have been proposed by archaeologists. The typical arrangement involved a trough, usually timber-lined or stone-built, filled with water, which was then heated by dropping fire-cracked stones into it. Those shattered, heat-spent stones were discarded nearby, accumulating over time into the horseshoe-shaped or oval mounds that survive in their thousands across Ireland. The site at Skarragh was recorded by Bowman in 1934, at which point it lay in the land of W. O'Callaghan. The burnt material noted by local sources had not been formally identified at the time of inspection, meaning the fulacht fia classification rests partly on the mound's form and the community memory attached to it, rather than confirmed excavated finds.