That elevation is not an accident of erosion; it is one of the defining characteristics of a rath, the Irish term for a roughly circular ringfort enclosed by an earthen bank, a type of settlement enclosure built widely across Ireland during the early medieval period, typically between the fifth and twelfth centuries. Most were farmsteads, home to a single family and their livestock, and thousands survive in varying states across the country.

This particular example at Knockroe measures approximately 29.4 metres on its northeast to southwest axis and 24.4 metres northwest to southeast, making it a reasonably substantial subcircular enclosure. The defining bank remains largely intact, and the site is described as being in fair condition. One detail worth noting is a gap of around 2.8 metres on the northwestern side, which appears to be of modern origin rather than an original entrance. The position on the ridge is telling; early medieval farmers, like their predecessors, tended to site such enclosures with an eye on the landscape, and the view eastward over Lough Avalla would have given both a practical outlook and a sense of territorial presence.