The mound, now levelled, once stood roughly 0.8 metres high according to local memory, and sits approximately 20 metres north of the river. That proximity to water is no coincidence.

Fulachtaí fia are found in their thousands across Ireland, typically dating from the Bronze Age, roughly 1500 to 500 BC, though some are earlier. They consist of a horseshoe-shaped or rounded mound of fire-cracked stone and charcoal, usually beside a stream or marshy ground. The accepted explanation, though not universally agreed upon, is that they functioned as cooking sites: stones were heated in a fire, then dropped into a water-filled trough to bring it to a boil, after which meat could be wrapped and submerged to cook. The repeated heating and quenching causes the stones to shatter and discolour, producing exactly the kind of burnt spread visible at Lisdangan. Some researchers have also proposed uses ranging from bathing to textile processing, and the debate has never fully settled. What remains here is modest in scale, a quiet smear of evidence in the grass, but it connects the land beside the Owenkeal to a pattern of activity repeated across this island for well over a thousand years.