The ringfort at Ballyvouskill sits on an east-facing slope in pasture, its roughly circular interior measuring around 29 metres north to south and 28 metres east to west. A bank of earth, originally faced with stone and still reaching up to 1.6 metres in height, defines the perimeter, though the stone facing is now largely ruinous. Two gaps punctuate the circuit, one to the north at about 2.5 metres wide and another to the southwest at 2 metres, either original entrances or later breaks. Trees have taken root along the bank, softening its profile and, in the process, accelerating the decay of the stonework beneath.

Ringforts, sometimes called raths, were the most common form of enclosed rural settlement in early medieval Ireland, typically serving as the fortified farmsteads of farming families between roughly the fifth and twelfth centuries. The earthen bank, sometimes augmented with stone facing as here, would originally have supported a wooden palisade, enclosing a domestic interior of timber buildings and associated activity. What makes Ballyvouskill a little more layered is the presence of two later intrusions into the monument. Cut into the outer face of the bank to the north-northeast are the remains of a lime kiln, a small industrial structure used to burn limestone into quicklime for agricultural improvement or construction, a common enough rural feature but an unusual one to find grafted onto a much older earthwork. More intriguingly, the interior may contain a souterrain, an underground stone-lined passage or chamber that often served for storage or refuge and is frequently found associated with ringforts across Ireland. The souterrain here is listed as a separate possible feature rather than a confirmed one, which gives the site a quality of quiet uncertainty.