This ancient defensive site occupies a steep-sided, roughly circular natural promontory measuring 55 metres from northeast to southwest and 32 metres from northwest to southeast. A low stone wall, now covered in grass, traces the entire perimeter of the fort; this defensive barrier stands noticeably higher at 65 centimetres on the vulnerable landward side, where a narrow entrance just over a metre wide provided controlled access to the enclosure.

The approach to this clifftop stronghold reveals the careful planning of its ancient builders. Visitors would have crossed a narrow isthmus connecting the promontory to the mainland, followed a stone-defined pathway, and then climbed a series of steps cut directly into the natural rock face to reach the fort above. Additional defensive features scattered around the site suggest this was once a well-protected settlement, though its position below higher ground on the landward side would have presented some tactical challenges to its defenders.

Today, the fort sits quietly amidst wet, rough grazing land near Muntermellan, its weathered stones bearing witness to centuries of coastal storms and changing fortunes. The site was formally documented in the Archaeological Survey of County Donegal in 1983, though its origins likely stretch back much further into Ireland's prehistoric past when such promontory forts served as both defensive strongholds and symbols of power along the Atlantic coast.