A promontory fort is exactly what the name suggests: a coastal or clifftop headland that was defended by cutting it off from the mainland using banks, ditches, and walls, letting the sea cliffs do the rest of the work. Here, the Atlantic obliged on three sides, and whoever built this place added at least three earthen banks along the landward approach to close the gap.

When the site was surveyed in 2003, the evidence was fragmentary but legible to a trained eye. The headland measures roughly 80 metres wide at its broadest and 110 metres in total length. One bank survives to about 2.3 metres in width and retains a shallow external fosse, the term for the ditch that would have been cut in front of a defensive bank to slow an approach. A second bank has been folded into a modern field boundary, a fate common to ancient earthworks across Ireland, though faint traces of a fosse cut into the western cliff edge remain visible. A third, more speculative feature, a shallow dip and low rise sitting 10 metres north of the main defences, may be the ghost of yet another bank. Several cattle gaps interrupt the enclosing elements, suggesting the site has been absorbed into farmland over the centuries, with any original entrance long obscured. Aerial observation also revealed a vague circular depression near the southern cliff, possibly the remains of a hut structure, though fieldwork in 2003 could not locate it at ground level.

The cliffs surrounding the headland are sheer, and the sloping grassy edge indicates the headland itself was once larger than what survives today, eroded back over time by the Atlantic. What remains is a site where the physical drama of the location still communicates something of its original logic, a piece of high ground made defensible by geography as much as by human effort, slowly being reclaimed by the sea that once protected it.