The site sits about 15 metres above the water, and its straight edge, running from south-west to north-north-west, is simply the cliff face. Everything else is defended by human effort: four concentric banks of earth and stone, each with its own fosse, a fosse being a defensive ditch dug to reinforce the bank behind which defenders would stand. The innermost bank is the most formidable, measuring 8 metres wide with a fosse more than 11 metres across and over 3 metres deep. The outermost bank, by contrast, is modest, less than half a metre high. Between the third and fourth lines of defence, a berm, a flat ledge of ground, runs around the circuit.

What makes the interior arrangement particularly curious is a line of large flat slabs that extends from the original southern entrance, crosses the enclosed area, and curves westward to end at the cliff edge. These stones appear to have served as a dividing boundary, separating a slightly raised south-western quadrant from the rest of the enclosure. Within that quadrant are the fragmentary remains of three circular hut sites, the kind of rounded stone foundations associated with early medieval settlement. One of them sits just 2 metres back from the cliff edge. A possible fourth hut survives in the south-eastern quadrant, and the cliff face at the north-western edge exposes what may be the cut of a souterrain, an underground passage typically used for storage or refuge in early Irish settlements, visible only in section where the cliff has eroded away. The 1913 Ordnance Survey map records the site as Cahermore, and local tradition connects it with the O'Caoimhin family. Disused field boundaries survive in the ground about 30 metres to the north, suggesting a wider landscape of activity that once surrounded the fort.