Known locally as Garra Mhary, the site is a subcircular enclosure, roughly 27.5 metres east to west and 23.9 metres north to south, its form interrupted by a stream that cuts through the enclosing wall at two points. Inside the ring sits a small rectangular drystone structure, just 4.6 by 4.5 metres, tentatively identified as the remains of a house. The combination of outer enclosure and interior building is a pattern seen across early Irish settlement archaeology, where a drystone or earthen boundary wall would define a domestic or agricultural space, sometimes a farmstead, sometimes something harder to categorise.

What gives Garra Mhary its particular interest is its setting within a wider complex of related features. Some 250 metres to the north-west lies a second enclosure, and between the two runs a field system, the buried outlines of which suggest that this hillside was once a worked and organised landscape. The stream that now bisects the monument was presumably a feature of the original environment too, and may have played a practical role in the life of whoever occupied the site. The drystone construction, using stones laid without mortar, is a technique with deep roots in the west of Ireland, where suitable building stone is plentiful and lime for mortar was historically scarce. The preservation is described as poor, meaning the walls have slumped and spread over time, making it difficult to read the original height or form of the enclosure.