A ringfort, known in Irish as a rath, is an early medieval enclosed settlement, typically dating from between the sixth and tenth centuries, formed by one or more earthen banks and ditches surrounding a domestic space. Here, the outer bank is poorly preserved and the fosse, the shallow ditch that would once have run around the exterior, survives only as a slight depression. The entrance gap at the south-southeast, just two metres wide, is now choked with stones.

The interior carries a more conspicuous wound. At some point, machinery scraped away part of the southeastern quadrant, removing a section of whatever below-ground evidence might have remained. Such disturbance is not uncommon in Irish ringforts; many have been damaged by agricultural improvement or simple neglect over the centuries, and this one bears that history plainly. What survives still reads as a coherent circular enclosure on a gentle northwest-facing slope, and a second ringfort lies only 150 metres to the northeast, suggesting this part of Ardnacrany was once a settled, inhabited landscape rather than a single isolated farmstead.