The promontory it defended, roughly oval and measuring about 125 metres east to west and 110 metres north to south, is flanked on one side by a deep coastal chasm and on the other by a shingle beach, with open water visible in almost every direction. What makes the site quietly remarkable is that it went entirely unrecorded for so long, absent from every edition of the Ordnance Survey maps, and was even dismissed outright by the antiquarian T. J. Westropp in 1912, who saw the walls as modern construction. He is thought to have viewed the site only from a distance, missing entirely the hut remains and the formal entrance pathway.

The defensive wall itself tells a more careful story on closer inspection. Originally around 3 metres thick, built in drystone with a rubble core, it ran for approximately 40 metres across the isthmus. Long horizontal slabs were set perpendicular to the wall face within the core at intervals, a technique used to bind and strengthen the structure, suggesting it once stood considerably higher than its current maximum of 2 metres above outer ground level. The sheer volume of collapsed rubble spread to either side supports that reading. Two entrances survive: a wider original one, about 7.5 metres across, approached by a stone-defined pathway some 21 metres long, and a more recent 5-metre gap broken through to accommodate farm machinery. Tucked within the wall core and scattered across the interior are at least five identifiable hut structures, ranging from small circular cells 2 metres in diameter to a rectangular building measuring 3.5 by 4 metres. A Second World War lookout post stands near the hilltop interior, one of many such structures placed along the Irish coastline during the Emergency period, and it sits close to a ruined rectangular building of uncertain date. Nearby, outside the fort boundary, a bullaun stone, a boulder with one or more artificial cup-shaped hollows often associated with early medieval religious or ritual activity, lies beside a stream, though whether it has any direct connection with the fort is not established. The site was documented in detail in Markus Casey's 1999 MA thesis surveying coastal promontory forts across counties Sligo, Mayo, Galway and Clare.