At Kilgevrin, that rise holds the remains of an early medieval rath, a type of ringfort formed by encircling a homestead with earthen banks and a fosse, the ditch dug between them, to define a defended or at least demarcated domestic space. What survives here is fragmentary: a subcircular enclosure measuring roughly 30 metres on its northwest to southeast axis, with two banks and the fosse between them still partially readable in the ground. The outer bank can be traced from the south-southwest around to the west, but from the northwest, continuing through north and around to the southeast, no surface trace remains at all. The earth has largely been reclaimed by the level field around it.

Ringforts are among the most common archaeological monument types in Ireland, with tens of thousands recorded across the country, most of them thought to date from roughly the sixth to the twelfth centuries. They functioned primarily as farmsteads, the banks marking the boundary of a family's working enclosure rather than a military fortification in any serious sense. This particular example at Kilgevrin is classed as poorly preserved, which means the visible evidence is limited, but it is not entirely gone. Interestingly, another ringfort lies approximately 350 metres to the east, a proximity that was not unusual; clusters of ringforts sometimes reflect extended family groupings or successive generations establishing their own enclosures close to an existing one. The relationship between these two sites, if any existed, is not recorded.