A rath, as these earthen enclosures are known in Irish, is a roughly circular bank and ditch construction, typically dating from the early medieval period and associated with farming settlement and the protection of livestock. This one is modest in scale, with a diameter of just over sixteen metres, and the trees planted directly on top of the earthen bank have compounded centuries of gradual erosion. What remains is less a monument than a subtle shift in the landscape: a raised interior, a fragmented circuit of bank, and a shallow outer ditch.

The enclosure sits on level ground approximately fifty metres from the lakeshore, a placement that would have made good practical sense for an early medieval household, combining reasonable drainage with proximity to fresh water. The bank, which originally defined the perimeter, now survives in its clearest form on the south-west and southern sides, where it still rises to just under a metre above the surrounding ground level on the exterior. A scarp, a steep face in the earthwork, continues around the south and south-west arc. On the north-north-east to east-south-east side, a fosse, the external ditch that typically accompanied such banks, remains detectable, though shallow at roughly twenty centimetres deep. The interior is raised about a metre above the external ground level and slopes gently down towards the south-west, a topographic detail that hints at how the original ground surface may have been managed or built up. The bank is broken by numerous small gaps, the cumulative result of time, land use, and the root systems of the plantation trees now growing through it.