The arrangement is modest in scale but precise in intent, and it is exactly this economy that makes the site quietly arresting. Whoever chose this headland understood the geometry of the place: roughly 120 metres from east to west, pinched to just 28 metres at the neck, with the sea doing much of the defensive work on all other sides.

Promontory forts of this kind are found all along the Irish coastline, particularly in Munster, and most are thought to date from the Iron Age, though many were likely reused across different periods. The builders here laid down an outer bank around 1.7 metres wide, a middle bank of similar dimensions, and a shorter inner bank surviving to only 4 metres in length at the northern end of the neck. The fosses between them, one around 4 metres wide and a narrower one of roughly 1 metre, created a layered obstacle at the only landward approach. The ends of both the middle and inner banks are now being eaten away by the sea, which is both the fort's oldest ally and its slowest adversary. The interior divides naturally into two halves: the western side is bare rock, while the eastern side has settled into rough pasture. Just beyond the neck, on the landward side to the east, faint traces of lazy-beds survive, the ridged cultivation strips once common across rural Ireland, running north to south, suggesting that the land immediately outside the fort was worked for crops at some point, though whether this overlapped with the fort's active use or came centuries later is unknown.