This almost perfectly circular enclosure, measuring roughly 30 metres across, is defined by an impressive earthen bank that rises up to 3 metres in height. A single 3.7-metre gap on the western side marks what was likely the original entrance, whilst an outer defensive ditch, or fosse, and additional external bank suggest this was once a place of some importance to its builders.

What makes this site particularly fascinating is the persistent local legend of a hidden cave somewhere within the interior, though no archaeological evidence has been found to support this tantalising bit of folklore. The earthwork sits on land that has undergone reclamation, which may have altered some of its original features over time. Its strategic position on the ridge would have offered excellent views of the surrounding landscape, making it an ideal location for either defensive purposes or ceremonial activities.

The site was first formally documented during the Archaeological Survey of County Donegal, conducted by Brian Lacey and his team in 1983. This comprehensive survey catalogued field antiquities spanning from the Mesolithic period through to the 17th century, providing crucial documentation of Ireland's rich archaeological heritage. Whilst the exact date and purpose of this particular earthwork remain uncertain, its substantial construction and defensive features suggest it may date from the Iron Age or early medieval period, when such ringforts were commonly built across Ireland as fortified homesteads or centres of local power.