This circular fortification, measuring 44 metres across, presents an intriguing puzzle to archaeologists who still debate whether it represents a bivallate site with two defensive rings or a univallate structure with internal buildings. The northern boundary is marked by a grassed bank standing up to a metre high, where stones peek through the vegetation, whilst a stream runs alongside it. The southern edge is defined by a sharp change in ground level, also about a metre high, reinforced with large stones that once formed a sturdy revetment.

Within this outer enclosure, set between 2 and 10 metres from the perimeter, lies an oval inner area measuring 25 metres east to west and 15 metres north to south. This inner space is bounded by what appears to be a collapsed wall of small stones, now partially covered by grass, with a possible entrance gap to the southeast. The most intriguing feature sits along the northern inner side of this enclosure; what archaeologists believe to be a blocked souterrain, an underground passage or chamber that would have served as cold storage or perhaps a hiding place during times of conflict.

This site was documented as part of the Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983, which catalogued field antiquities from the Mesolithic period through to the 17th century. The cashel’s construction, with its careful stone revetting and possible souterrain, suggests a settlement of some importance, though time and the elements have softened its once formidable defences into the gentle undulations visible today.