The ringfort at Cloncose carries the traces of a possible souterrain, an underground stone-lined tunnel typically used in early medieval Ireland for storage or refuge, running westward from the original entrance toward the centre of the enclosure. Whether it was ever fully excavated, or whether it simply collapsed quietly over the centuries, is not recorded. What remains visible above ground is still substantial: a raised circular area roughly 38 metres in interior diameter, enclosed by not one but two earthen banks, each with its own outer fosse, or ditch, ringing the whole.

The double-bank arrangement marks this out as a more elaborate example of its type. Ringforts, known in Irish as raths when constructed from earth, were the standard farmstead enclosure of early medieval Ireland, built and occupied roughly between the fifth and twelfth centuries. A single bank was the norm for most households; two suggested something more, whether greater wealth, higher status, or simply a stronger need for defence. At Cloncose, the outer fosse has not survived entirely intact. Over time it was modified and absorbed into the surrounding field drainage network, the kind of quiet, practical alteration that has reshaped thousands of such sites across Ireland without anyone particularly intending to erase the archaeology. The northeast section preserves what appears to be the original entrance, marked by corresponding gaps in both banks and a causeway crossing the ditch between them.