It measures roughly fifteen metres across and rises to about 1.2 metres, built not from earth or stone in the conventional sense but from burnt material, the accumulated debris of repeated heating. Local tradition holds that the mound was once used as a burial ground for children, a belief that quietly transforms what archaeology regards as a prehistoric cooking site into something more solemn and more layered.

The structure is a fulacht fia, a type of monument found in considerable numbers across Ireland, typically dating to the Bronze Age. The basic principle involves heating stones in a fire, dropping them into a water-filled trough to bring the water to boiling point, and repeating the process until the stones crack and splinter from the thermal stress. Over time, these shattered, fire-blackened stones accumulate beside the trough, forming the characteristic horseshoe mound that survives at sites like this one, with the open end of the horseshoe marking where the trough once sat. The burnt mound at Blueford follows that pattern precisely, its south-east-facing opening corresponding to the likely position of the cooking pit.

What makes this particular site linger in the mind is the gap between its archaeological classification and its place in local memory. The association with children's burial, known in Irish tradition as a cillín, speaks to a separate and very different kind of use, whether real or imagined. Cillíní were informal burial grounds used for unbaptised infants and others excluded from consecrated ground, and they appear throughout Ireland in association with older earthworks and mounds whose original purpose had been forgotten. Whether or not the Blueford mound ever served that purpose, the tradition attached to it reflects something genuine about how communities have long read the landscape, finding meaning in unexplained shapes in the ground.