Measuring 32 metres north to south and 62 metres east to west, this ancient structure makes clever use of the natural topography. The northern side takes advantage of a rock outcrop that drops dramatically about three metres, creating a natural defensive wall, whilst the western, southern and eastern sides are enclosed by collapsed stone walls built by human hands.

What makes this site particularly intriguing are the oval and circular cleared areas that dot the perimeter all around the wall. These clearings aren't unique to this location; they've been spotted at similar sites throughout County Donegal and are thought to date from relatively recent times, perhaps representing later agricultural or pastoral use of these ancient enclosures. The exact purpose of the original structure remains something of a mystery, though its substantial size and strategic use of natural defences suggest it may have served as a livestock enclosure or seasonal settlement.

The site was documented as part of the Archaeological Survey of County Donegal, a comprehensive catalogue compiled by Brian Lacey and his team in 1983 that records field antiquities from the Mesolithic period through to the 17th century. Though the boggy mountain setting makes it somewhat challenging to reach today, the enclosure stands as a testament to the ingenuity of those who built in these upland areas, adapting their construction techniques to work with, rather than against, the rugged Donegal landscape.