What survives is roughly half of the larger enclosure, but that half is enough to read the original intention: a roughly circular space about twenty metres across, ringed by an earthen bank and a fosse, the external ditch that would once have complemented the bank to define and defend the perimeter.

Enclosures of this type, sometimes called ringforts or raths, were a common form of rural settlement in early medieval Ireland, typically enclosing a farmstead and its immediate working space. The bank here is modest, around eighty centimetres high and a metre and a half wide, with a fosse of similar proportions running outside it. Attached to the east is a second, slightly smaller enclosure, oval or circular in plan, measuring roughly fifteen metres east to west and twelve metres north to south. Its bank is slighter still. The relationship between the two enclosures is not entirely clear, but paired or conjoined enclosures are known elsewhere in the Irish landscape and may reflect different functional areas within a single settlement, or successive phases of occupation and expansion.

The forestry track and field boundary that cut across the northern arc of both enclosures are a reminder of how much of this kind of evidence has been quietly eroded over centuries of agricultural and commercial land use. What remains at Crone is incomplete but legible, a faint geometry in the ground on a slope that slopes away sharply to the north and rises again to the south.