It is roughly twelve metres long, just under ten metres wide, and little more than half a metre tall. Yet this modest hump represents one of the most common prehistoric site types in Ireland, a fulacht fia, and its ordinariness is precisely what makes it interesting.

A fulacht fia is a burnt mound, typically Bronze Age in origin, associated with the repeated heating of stones in fire and their subsequent plunging into water-filled troughs to bring the water to a boil. The stones crack and shatter with the thermal shock, and over time the discarded fragments accumulate into a crescent or horseshoe-shaped mound, often stained dark with charring. Thousands of these sites are recorded across Ireland, and their precise function has been debated for decades. Cooking is the most widely accepted explanation, though brewing, bathing, and textile processing have all been proposed. The Blueford example sits in land that has been reclaimed for pasture, which means the surrounding agricultural activity has reshaped its context considerably, even if the mound itself survives. A small hollow, measuring roughly 0.3 metres by 0.4 metres, is visible on the eastern side, the product of recent digging rather than any ancient feature.