It measures roughly 26.6 metres across the interior, encircled by a low earthen bank and the faint remnants of a fosse, the shallow ditch that would originally have run around the outside of the bank to reinforce the enclosure's boundary. The original entrance has been lost entirely, leaving no obvious point of orientation.

This is a rath, the most common type of ringfort found across Ireland, typically dating from the early medieval period, roughly the sixth to the twelfth centuries. Raths were farmsteads, the enclosed homesteads of farming families rather than military fortifications, and they appear in their thousands across the Irish countryside. At Curraghglass, the perimeter has been partially modified and folded into the modern field system over the centuries, which is a common fate for these structures. Farmers working the same ground across generations have found it practical to use the existing bank as a ready-made field boundary, gradually obscuring the original form without removing it altogether. The result is a site that is archaeologically present but visually ambiguous, its circular logic still legible if you know what you are looking at.