This is a ringfort, or enclosure, of the kind that once served as a farmstead or place of refuge, probably during the early medieval period, when thousands of such structures were raised across Ireland. Most have been ploughed away, built over, or gradually eaten by erosion. This one, above the bogland at Cornacoyntia, has survived in notably good condition.

The enclosure is subcircular, measuring approximately 27.5 metres east to west and 26 metres north to south, and is defined by a bank of earth now heavily overgrown with vegetation. Several gaps interrupt the bank at various points, though these appear to be the result of more recent interference rather than original features of the design. The site sits on a gentle rise in undulating grassland, positioned to overlook bogland to the south, a placement that would have offered both a degree of natural drainage and a clear view of the surrounding landscape, qualities that clearly mattered to whoever chose the spot.