What was almost certainly a five-stone circle, a type of small megalithic arrangement particular to Munster in which five stones are set out with a low, flat axial stone placed opposite a pair of taller portal stones, now amounts to just two stones still standing in anything like their intended positions, with two more propped against a nearby fence.

Five-stone circles are a distinctly Cork and Kerry phenomenon, generally dated to the Bronze Age, and they follow a consistent internal logic: the axial stone, the lowest of the group, is placed on the southwestern arc, and the whole arrangement is oriented along a northeast to southwest axis, often aligned with a lunar or solar event. At Carrigagrenane, that axis is thought to have run northeast to southwest, consistent with the broader tradition. The axial stone, measuring roughly 1.5 metres long and just under a metre high, and the northern flanking stone beside it are the two that remain upright. The pair leaning against the fence to the east may once have been part of the circle, displaced at some point during the clearance or enclosure of the land. The site was catalogued by Seán Ó Nualláin in 1984, whose systematic survey of Cork and Kerry stone circles remains a foundational reference for understanding these monuments across the region.

The setting itself, low-lying ground at the valley head with the hill rising behind, is typical of the siting preferences associated with these monuments, which tend to avoid hilltops in favour of more sheltered positions with long views along a valley floor. The two surviving upright stones are modest in scale but legible enough in the landscape, and the fence-propped stones nearby give a reasonable sense of what the full complement might have looked like before the circle was disturbed.