Someone, at some point, went to the trouble of blocking it with stones, turning what was presumably an entrance into a sealed threshold. Whether that happened in the early medieval period when this ringfort was in use, or centuries later when the land was given over to grazing, is not recorded.

The fort sits on a north-east-facing slope above the Argideen river in Knocks, Co. Cork, and takes the form most commonly associated with the Irish rath, a roughly circular enclosure defined by an earthen bank rather than a stone wall. A rath of this kind would typically have served as a farmstead during the early medieval period, housing a family of some local standing along with their animals and stores. This one measures around 33 metres across, with a bank rising to about 2 metres and faced with stone on its outer side in several places, suggesting a degree of care in its original construction. The interior dips slightly, giving it what is described as a saucer shape, a feature sometimes associated with drainage or with the gradual settlement of material over many centuries of undisturbed pasture.