The mound is horseshoe-shaped in plan, a form characteristic of the type, with a central depression that would once have contained a water-filled trough. The idea is straightforward enough: stones were heated in a fire, dropped into the trough to bring the water to a boil, and whatever needed cooking or processing was immersed. The discarded cracked and fire-shattered stones accumulated over time into the distinctive mounded shape that survives today. What makes the Kilcorney example worth attention is the detail that has endured despite considerable disturbance.

The mound measures roughly 17.4 metres on its longest axis and stands up to 1.4 metres high, though the south-western ends of both arms were levelled at some point in the relatively recent past, and the original structure appears to have extended a further 6.5 metres in that direction. A field wall cuts across the surviving remains from north-west to south-east, and to the north-east the mound edge is held in place by a line of large boulders. Within the central depression, which measures approximately 4.5 by 3 metres, the rectangular stone-lined trough is still clearly defined on three sides, with straight-edged stones forming the west, north, and east walls; the south side has collapsed into a jumble. Unusually, the fill within contained hard clay and stones with no evidence of burning, and the mound material itself is a mix of very friable small limestones and larger unburnt stones in a black clay matrix. The absence of burning evidence sets it slightly apart from the typical picture. An enclosure lies roughly 20 metres to the south-west, and the surrounding landscape holds a dense concentration of enclosures, house sites, hut sites, cairns, and associated field boundaries, all of probable prehistoric date, suggesting this was once a well-populated and actively used stretch of ground.