The interior, roughly 24.7 metres across, is enclosed by a substantial earthen bank and a wide, shallow fosse, the term for the ditch that typically runs outside such a bank, often serving both a defensive and a symbolic boundary function. That fosse is partly waterlogged now, which gives the whole structure a slightly moated quality, an accidental wetland wrapped around an ancient enclosure.

Ringforts, also known as raths, were the most common form of rural settlement in early medieval Ireland, used roughly between the sixth and twelfth centuries as enclosed farmsteads for a single family or small community. The bank at Corrinshigo conforms to the standard type: a single earthen rampart, no stone facing, built up from the soil thrown outward when the fosse was dug. What offers a small point of interest here is the northeast section of the bank, where a disturbed break most likely marks the original entrance. Entrances on the eastern side of ringforts are common enough to be considered something of a pattern, possibly connected to solar orientation or simply to the prevailing winds, though the precise reasons remain a matter of discussion among archaeologists.

The site is densely overgrown with vegetation, which is typical of ringforts that have escaped agricultural clearance. That covering of scrub and bramble is, in its own way, a form of preservation, keeping the earthworks from being ploughed or levelled, even if it makes the structure harder to read from ground level.