The circular enclosure, roughly thirty metres across, is gone at ground level, levelled out of the landscape so thoroughly that a visitor walking the field today would find no earthwork, no bank, no ditch, nothing to suggest that early medieval people once enclosed their farmstead or homestead within a raised circular boundary. What survives is its outline on an 1842 Ordnance Survey six-inch map, where it appears as a hachured circle, the standard cartographic shorthand for an earthen enclosure of this kind. Even then, the map shows it already being cut across by field fences running north to south and east to west, the geometry of later agricultural reorganisation imposed directly over the older pattern.

Ringforts, known in Irish as raths when defined primarily by earthen banks and ditches, were the dominant form of rural settlement across Ireland from roughly the early medieval period onward, and many thousands once dotted the countryside. The example at Ballinvarrig would have been a modest one by any measure, its thirty-metre diameter placing it at the smaller end of the scale, likely enclosing the dwelling and outbuildings of a single farming family. The 1842 map is a useful marker here: it tells us the fort was already being absorbed into post-medieval field patterns by the time the Ordnance Survey reached Cork, even if it retained enough definition to be recorded. At some point after that survey, whatever remained above ground was removed altogether. About two hundred metres to the south-east, a standing stone survives as a separate monument, a large upright stone of uncertain but likely prehistoric date, its presence a reminder that this particular corner of east Cork accumulated significance across very different periods.