What you see today is an almost circular enclosure, roughly 32 metres north to south and 31 metres east to west internally, its perimeter now traced by a modern drystone wall built more or less on top of whatever original structure survived. The replacement is tidy enough to be easily missed for what it is: a working field boundary that happens to follow the ghost of something considerably older.

The site is recorded under the name Cathair Rois, as it appears on Tim Robinson's 1977 map of the Burren, a name suggesting a stone fort associated with a promontory or wood. By the time the first Ordnance Survey mapped this part of Clare in 1840, the cashel's outline had already shifted; the map shows straight sides with definite corners to the north, east, and west, which is a curious departure from the usual rounded form. Beneath and around the modern wall, occasional large foundation stones and possible facing-stones just east of north point to an original wall thickness of around 1.5 metres, which would have made for a substantial barrier. Abutting the southern side of the cashel is a trapezoidal field enclosure containing the foundation of an 18th or 19th century rectangular house, a reminder that later generations found the old fort's footprint a convenient boundary for their own purposes. A turf stand, used for drying or storing cut peat, sits about 60 metres to the south, suggesting the area remained actively worked well into the modern period.