The enclosure exists, as far as current knowledge goes, only as a cropmark, the faint but legible signature of a buried fosse, or ditch, that shows up in aerial photography when differential moisture in the soil causes crops to grow unevenly over buried features. The circular outline measures approximately thirty metres in diameter, a scale consistent with the kind of enclosed farmstead or ringfort that was a common unit of rural settlement in early medieval Ireland.

Cropmark evidence of this kind can be elusive. The fosse itself, once dug to define and defend the perimeter of an enclosure, has long since filled in, but the disturbed soil within it retains moisture differently from the surrounding ground, and in the right conditions, usually a dry summer when crops are under stress, the contrast becomes visible from the air. The site at Ballyadeen was identified through an aerial photograph held in the Geological Survey of Ireland Air Photograph collection. Beyond that image, very little is documented about the site; no excavation has been recorded, and the enclosure has not been confirmed on the ground in any detail made publicly available.