This circular earthwork measures approximately 22 metres north to south and 24 metres from west-southwest to east-northeast, with an earthen platform rising between 20 centimetres and nearly 3 metres above the surrounding landscape. The defensive bank that once completely encircled the site still stands up to 1.15 metres high, though it’s now missing in the northeastern section where a later field wall cuts through the monument. The southwestern portion shows intriguing evidence of stone revetment, suggesting the earthen bank may have been reinforced or topped with a stone wall, whilst traces of what appears to be a well can be spotted on the outer slope of the bank on the south-southwestern side.

The site occupies a strategic position on a low hill surrounded by undulating terrain, with marshy lowlands giving way to a patchwork of decent and rough grazing land on the higher ground. Inside the enclosure, the ground is largely flat, though an arc of earthen bank about 1.9 metres wide curves along the northeastern sector where it meets the field wall. Earlier reports from 1973 mentioned possible traces of a collapsed souterrain, an underground passage or chamber often associated with ringforts, though later surveys couldn’t confirm its presence.

Archaeological testing carried out in April 2000 at nearby Drumbarity, roughly a kilometre northwest of Killybegs, revealed the typical stratigraphy of the area; bedrock and gravelly subsoil sealed beneath layers of sandy silts, gravels and clays. Whilst that particular excavation found nothing of archaeological significance, it helps paint a picture of the landscape these ringforts once dominated. The Largynagreana ringfort remains an evocative reminder of the defended farmsteads that dotted the Irish countryside between roughly 500 and 1200 AD, when local communities built these impressive earthworks for protection, status, and as centres of agricultural life.