What survives instead is a fosse, a defensive ditch cut into the ground, tracing a semicircle roughly 26 metres across along the clifftop. The cliff itself appears to have served as the fourth side of the enclosure, with the sheer drop to the sea doing the work that stone or earthen ramparts would otherwise perform. The fosse drops a metre below the surrounding ground on the outer side and two metres below the interior level, which gives some sense of the effort involved in its construction. A causeway crosses it at roughly its midpoint, the only formal way in or out.

The site was recorded by O'Leary and Snodgrass in 1976 and later included in the Corca Dhuibhne archaeological survey of the Dingle Peninsula, published by J. Cuppage in 1986. What the record cannot tell us is much about date or function beyond the bare outlines. Cliff-edge promontory forts of this general type are found at various points along the Irish Atlantic coastline, typically using natural topography to reduce the amount of artificial defensive work required. What makes this example quietly peculiar is the complete absence of any wall or bank alongside the ditch. Whether one was never built, or whether it has simply vanished without trace, is not something the surviving evidence settles.