This particular example at Tristaun is the lesser of the pair, poorly preserved and easy to overlook, but it preserves enough of its original form to read as a coherent site rather than a field anomaly.

A rath, the Irish term for a ringfort defined by an earthen bank and ditch rather than stone, typically enclosed a farmstead of the early medieval period, broadly from around the fifth to the twelfth century. This one is nearly circular, measuring roughly 26 metres north to south and 25.5 metres east to west, dimensions that place it in the modest but entirely typical range for the type. Its enclosing elements survive unevenly: an overgrown bank with an external fosse, a ditch dug to throw up material for the bank, runs from the south-south-east around through south to west, while elsewhere the boundary has reduced to a scarp and a faint depression in the ground. A gap of about five metres at the south-south-west may represent the original entrance, though it is impossible to be certain without excavation. A field bank, probably of post-medieval date, cuts across the monument at both the north-west and south-west, which accounts for some of the damage and makes the plan harder to read at ground level.