A bivallate rath, meaning one enclosed by two concentric earthen banks rather than the more common single ring, this site near Carhan preserves a detail often lost elsewhere: a southern stretch of the outer bank has been absorbed into a later stone field boundary, yet the boundary faithfully follows the original curve, as though the landscape quietly remembered what was there.

The earthworks themselves are still substantial. The outer bank stands up to 1.5 metres above the surrounding ground at its north-east, and between it and the steep inner bank lies a flat-bottomed fosse, the ditch that would have added considerably to the defensive profile of the whole enclosure. The inner bank is revetted on its interior face with drystone masonry, a technique of facing earthworks with carefully laid unmortared stone to prevent erosion and slippage, and traces of similar stonework appear on its outer face. A causeway crosses the fosse at the east, leading through a 2.6-metre entrance gap. Just inside, a small L-shaped structure, open to the north, sits against the bank wall; its purpose is unclear, though such features in Irish early medieval raths are sometimes interpreted as guardrooms or animal pens. More striking is the large rectangular building that fills most of the northern half of the interior, measuring over 16 metres by 7 metres internally, with walls a metre and a half thick surviving to a height of 1.25 metres. Three gaps punctuate its southern wall, and the central one may represent the original doorway. In 1956, a researcher named Donaldson recorded a blocked entrance to a souterrain, an underground stone-lined passage or chamber typically associated with storage or refuge, just north of the building.

The rath sits within a landscape dense with early medieval archaeology, and the presence of four such enclosures grouped on these same slopes suggests a community of some organisational complexity rather than isolated farmsteads. The rectangular building, unusually large for a rath interior, raises questions that the earthworks alone cannot answer.