The 1842 Ordnance Survey six-inch sheet shows a clearly hachured circular enclosure of roughly 35 metres in diameter, the kind of shorthand cartographers used to indicate earthen banks and ditches. Today, the bank itself is largely gone, yet a penannular arc, that is, an almost-complete ring left open at one point, survives along the north-west to south-west arc as a low scarp rising to about 1.6 metres. The western edge is harder still to trace, since a field boundary that once ran immediately alongside it has been removed, taking with it the clearest remaining line of demarcation.

Ringforts, known variously as raths or cashels depending on whether they were built from earth or stone, were the most common settlement form in early medieval Ireland, typically serving as the enclosed farmsteads of farming families between roughly the fifth and twelfth centuries. This particular example carries an additional layer of interest in its relationship to a nearby castle. The site of Caherduggan Castle is shown on the same Ordnance Survey maps as sitting on or just outside the northern edge of the enclosure, a proximity that is unlikely to be accidental. It was not unusual in medieval Ireland for later fortifications to be planted in close association with earlier earthworks, whether for reasons of defensible topography, local tenure, or simple continuity of significant ground. The overlapping of these two sites at Caherduggan compresses a span of Irish settlement history into a single modest field, even if much of the physical evidence has since been absorbed back into the pasture around it.