The enclosure measures approximately twenty-five metres in diameter, and what makes it particularly interesting is the evidence of later interference along its northern and eastern sides, where a wall appears to have been laid directly over the original structure. This kind of superimposition is common in Irish landscapes where people returned repeatedly to the same ground, each generation repurposing or simply crossing the boundaries left by earlier ones.

The enclosure forms part of a wider multiperiod field system in the Formoyle area, meaning the surrounding land carries traces of organised agriculture or settlement from more than one era. Enclosures of this general type, broadly subcircular in plan and defined by an earthen bank, are found across Ireland and are often associated with early medieval settlement, though they can date from a considerable range of periods. Here, the bank runs from the south-east to the north-west, giving the structure an orientation that broadly follows the slope. The fairly straight runs on the northern and eastern sides distinguish it from the more fluid curves typical of a simple ringfort, and suggest the site has a more complicated history than a single phase of construction would produce.