Known as Lisbeg, or Lios Beag, meaning simply "small ringfort" in Irish, it survives today as little more than a shallow circular earthwork, its bank worn down and spread wide by centuries of agricultural use. Yet the earthen ring still holds its shape: roughly 45 metres across in both directions, the enclosing bank rising to around 0.8 metres above the interior and between 1.1 and 2.2 metres above the ground outside, depending on where you measure. That asymmetry, subtle as it is, is what remains of an early medieval boundary that once meant something very specific to the people who lived within or near it.

Ringforts, known variously as raths or lios depending on their construction and the tradition of those naming them, were the most common form of rural settlement in early medieval Ireland, typically serving as enclosed farmsteads for a single family and their livestock. What gives Lisbeg its particular interest is its relationship to a larger fort immediately to its north-east. It was probably a satellite of that main enclosure, a secondary structure dependent on or associated with the principal rath nearby. This kind of pairing, a large fort accompanied by a smaller one on its periphery, is not unusual in the Irish landscape, and likely reflects social hierarchies or functional arrangements within a farming community, perhaps separating livestock from living quarters, or housing dependants close to a more prominent household. The site is described as univallate, meaning it has a single enclosing bank rather than the multiple concentric earthworks that sometimes indicate higher status.