Roughly 150 metres north to south and about 100 metres east to west, it is defined on three sides by low earthen banks and a scarp, and on the remaining side by a townland boundary. The 1834 edition of the Ordnance Survey six-inch map recorded a burial ground at its centre, but nothing of that is visible today. What does survive, sitting at the field bank to the east-southeast of the enclosure's centre, is a bullaun stone, a rounded boulder with one or more artificial cup-shaped hollows worn or carved into its surface. Bullaun stones are found across Ireland in early medieval ecclesiastical contexts, often associated with ritual use, cursing, or healing traditions, and their presence is frequently the most durable trace left by a vanished religious community.

The enclosure falls within the parish of Donaghmoyne, a placename whose element "Domhnach" points to an early church foundation, possibly one of the earliest wave of Christian sites in Ireland. Local tradition holds that a St. Derrig established a monastery here, though this association has not been confirmed by documentary or archaeological evidence. The name St. Derrig does not appear in the major corpus of Irish saints, and the tradition may preserve a genuinely obscure local figure whose cult left no written record. The enclosure's form, a substantial oval defined by a bank and natural topographic boundaries on the slope of a drumlin, is consistent with the kind of ecclesiastical enclosure that surrounded early Irish monasteries, where the boundary itself carried ritual and legal significance as much as a physical one.