Easy to walk past, easy to dismiss as a natural feature of the boggy upland ridge, this is almost certainly the robbed-out remains of a prehistoric burial cairn, its stones long disturbed, its covering mound reduced to little more than a suggestion in the landscape. What saves it from complete obscurity is the outline: a roughly circular arrangement of low upright stones, around 8.8 metres in external diameter, still legible enough to be identified on satellite imagery taken between 2011 and 2013.

At the centre of that circular revetment, the stones that matter most are a series of orthostats, low slabs protruding just 0.3 metres above the surface. They form a cist, a type of stone-lined burial box used widely in prehistoric Ireland, roughly three metres long and one metre wide, aligned approximately north to south. Two further stone slabs lie flat on the ground to the north of the upright orthostats; these are thought to be displaced capstones, the covering slabs that would originally have sealed the cist. The loose stones scattered around the perimeter are likely what remains of the original cairn material that once covered the whole structure. The record was compiled by Caimin O'Brien, drawing on information provided by John Carey, and uploaded in September 2020.

The cairn sits on a ridge of poorly drained ground, the kind of wet upland terrain that has kept many such sites from more intensive disturbance over the centuries. The location commands views across a wide arc of countryside from north-east round through east and south to west, which is consistent with how many prehistoric communities positioned their burial monuments, within sight of the surrounding land rather than hidden from it. Some 800 metres to the north-west, the summit of Cullaun Mountain carries a separate monument, a ring-barrow, rising noticeably higher above the cairn site. Visitors approaching on foot should expect rough, heather-covered ground and the usual challenges of upland navigation in Limerick; the monument itself is subtle enough that patience and a slow pace are more useful than any map reference alone.