What makes it legible even now is not dramatic stonework or elaborate defences, but simple geometry: a circular platform roughly 28 metres across, set slightly apart from the surrounding land by an earthen scarp that still stands around 1.3 metres high on its outer face. At the north-east, a ramp just over three metres wide breaks the line of that bank, preserving the position of the original entrance exactly where it was left.

The site belongs to a category of monument found throughout Ireland, the rath or ringfort, an enclosed farmstead typically dating from the early medieval period, roughly the fifth to the twelfth centuries. These were not military fortifications in any serious sense but rather the homesteads of farming families, their earthen banks defining a space for a house, outbuildings, and the protection of livestock. At Carrownteane, the interior slopes gently to the north-east, and against the inner face of the bank at the north-west there are traces of what may have been a hut site, a structural remnant suggesting where someone once lived within that enclosure. The slight north-facing slope of the broader landscape is worth noting too; most ringforts were positioned with some attention to drainage and outlook, and this one sits unobtrusively within the undulation of the surrounding ground rather than dominating it.