What survives of this circular enclosure is not a wall or a ditch but a scarp, a subtle change in ground level that traces an arc from the north-east, around the east, and down to the south-west. That partial curve is all that remains visible of what was once a roughly circular enclosure approximately 45 metres across.

Enclosures of this kind are among the most common archaeological features in the Irish landscape, typically interpreted as the remains of ringforts, the farmsteads of early medieval Ireland, though some may be earlier still. They were usually defined by an earthen bank, a ditch, or both, enclosing a domestic space where a family and their livestock would have lived and sheltered. At Castletogher, the enclosing element has been interrupted on at least two sides: a road cuts through it from the south-west to the north-west, and a field wall crosses it at both the north-west and north-east. The result is that only the eastern arc of the scarp reads clearly in the ground. The site looks out over bogland to the east, a landscape that would once have been a working resource for whoever occupied the enclosure, providing fuel and raw materials. A castle, catalogued separately, lies to the north of the enclosure, hinting that this particular patch of ground had a long and layered history of occupation across different periods.