The site is a subcircular enclosure, roughly 24.5 metres east to west and 19.8 metres north to south, and what survives of it is barely legible in the landscape. Its defining feature is the remnant of an infilled fosse, a ditch that would originally have defined the perimeter, now most visible along the southern side. The rest has effectively disappeared.

Enclosures of this general type are among the most common early medieval monuments in Ireland, often interpreted as the remains of ringforts, the enclosed farmsteads that formed the basic unit of rural settlement from roughly the fifth to the twelfth centuries. A fosse is simply a defensive or boundary ditch, typically dug to throw up a bank on the inner side. Here, that bank is gone and the ditch has long since been filled in, leaving only the slightest trace. What makes the Corbally example worth noting is partly its proximity to another enclosure some 50 metres to the west, a pairing that occasionally signals a more complex pattern of activity, whether successive occupation, related functions, or simply a landscape that supported a cluster of settlement over time. The relationship between the two, however, is not recorded in any detail.