Wind-blown sand from the nearby Atlantic coastline has piled up against the interior face of the bank, forming a broad, low mound that was never planned or built but simply accumulated. The result is a site that has been quietly reshaped by its environment, as much by weather and drift as by any human hand.

Known locally as Lisroe or An Lios Rua, the rath sits on low-lying ground roughly 450 metres east of Smerwick Harbour on the Corca Dhuibhne peninsula. A rath is a ringfort, the type of enclosed farmstead that was the dominant settlement form in early medieval Ireland, typically dated to somewhere between the sixth and tenth centuries. This example is univallate, meaning it has a single enclosing bank rather than the two or three concentric rings seen at more elaborate sites. That bank, built from fine earth and sand rather than the stone more common in west Kerry, rises to 2.25 metres on its outer face, though only about 1.1 metres on the inside. Along the eastern half of its interior, the bank is faced with drystone masonry, a detail that suggests some structural care was taken at least on that side. An external fosse, a defensive ditch, survives intermittently around the outside, reaching up to 3.15 metres wide, though only 0.35 metres deep. The interior diameter is 27.8 metres, a respectable amount of enclosed space for a single farming household. The details were recorded by J. Cuppage as part of the Dingle Peninsula archaeological survey published in 1986.