The feature is subcircular in shape, measuring roughly 70 metres on its north-east to south-west axis and around 50 metres across, and is defined by a low bank of earth and stone. A cashel, for those unfamiliar with the term, is a dry-stone ringfort, and this part of Clare holds an unusual number of them clustered together on the same upland terrain.

The enclosure sits at the south-western limit of a larger field system and forms part of what appears to be an organised, if now largely silent, agricultural and settlement landscape. About 100 metres to the north-east stands Faunarooska Castle, which gives the townland its name. The presence of a castle so close, alongside multiple cashels and enclosures radiating outward across the hillside, suggests this corner of Slieve Elva was occupied and actively worked across several distinct periods. The bank itself is modest enough that it would not draw the eye at ground level; it was aerial photography, specifically ortho photography from between 2013 and 2018, that made the enclosure's outline legible in any precise way.