The site at Ardgoul North is a rath, the Irish term for a ringfort, which was typically a circular or near-circular enclosure defined by one or more earthen banks and ditches, most commonly used as a farmstead during the early medieval period. What makes this example worth a second look is not dramatic scale but the combination of a roughly circular main enclosure and a secondary oval feature abutting it to the south-east, a pairing that raises questions about the site's original function and phasing.

The main enclosure measures approximately 25 metres north to south and 23.2 metres east to west, enclosed by an earth-and-stone bank that survives to an internal height of around 0.45 metres and an external height of 0.6 metres. Its best-preserved section runs along the north-west arc, where the bank has been absorbed into the existing field boundary system, suggesting local farmers found it useful enough to retain rather than level. The bank is at its lowest along the northern to south-eastern stretch, and there is a clear dip roughly 5.5 metres wide at the south-east, which may represent an original entrance. The secondary enclosure is oval, roughly 26 metres on its longer axis and 14 metres on the shorter, with a more denuded bank surviving to only 0.2 metres internally. Compiled by Denis Power and uploaded to the record in August 2011, the site note flags that this secondary feature may partly overlie a natural limestone shelf extending westward beyond the field boundary, introducing an element of geological ambiguity that makes the enclosure's true extent difficult to read.

The site sits in low-lying pasture on a gentle south-facing slope, the interior dropping softly toward the south beneath its grass cover. There is no public monument signage, and access would depend on landowner permission, as is standard for most unexcavated ringforts in private agricultural land across Ireland. The north-west bank arc, where it merges with the field boundary, is the clearest section to trace on the ground. The secondary oval feature to the south-east requires more patience, its bank being considerably reduced. Early morning light in autumn or winter, when vegetation is low and shadows are long, gives the best chance of reading the earthworks clearly from field level.