This is not the tidy, symmetrical outline that tends to appear in textbook illustrations of prehistoric cairns. It is irregular in shape, roughly 11 to 12 metres long on a NNW to SSE axis and about 4 metres wide, and the difference in elevation between its two ends, around 2.5 metres, gives it an oddly raking profile that the surrounding hillside does much to explain. Nowhere does it rise more than 1.5 metres above the ground on either side, making it easy to overlook if you are not already looking for it.

At the south-eastern end, two possible upright slabs suggest some structural intent, hinting that this may be the remains of a megalithic tomb or burial monument, though the cairn material itself, the loose stones heaped around and above any internal structure, has long since settled into the slope and acquired a thick skin of grass. A cairn in its most basic sense is simply a deliberate accumulation of stones, often raised over a burial, a boundary, or a significant point in a landscape, and the Dingle Peninsula has no shortage of them. This particular example was recorded and described by J. Cuppage in the 1986 Corca Dhuibhne archaeological survey of the peninsula, a foundational catalogue of the extraordinary density of ancient monuments found across this part of Kerry. The landscape of An Gleann Mór, like much of Corca Dhuibhne, preserves traces of human activity across a very long span of time, and this unassuming mound is one quiet piece of that larger accumulation.