The site at Ballyegny is a rath, the most common type of ringfort found across Ireland, typically built between roughly 500 and 1000 AD as a fortified homestead for a farming family. What survives is modest but readable: an oval earthwork roughly 17.6 metres north to south and 19.4 metres east to west, sitting on an east-facing slope and still holding its essential shape after more than a millennium of agricultural use.

The enclosure is defined by an earth-and-stone bank that stands about a metre above the surrounding ground on the exterior, though cattle have worn it down considerably in places and thorn bushes have colonised stretches of it. Beyond the bank runs the fosse, nearly four metres wide and a metre deep where it survives most clearly along the eastern to northern arc. Elsewhere the ditch has largely silted and softened into marshy ground, and it is there that the irises have taken hold, tracing the old boundary in botanical form. An entrance, 3.6 metres wide, opens at the east-northeast, though it is now partially blocked with loose stones. Along the outer southern to western edge of the fosse there are faint traces of stone that may represent the remains of a second, outer bank, a feature seen on some more elaborate raths, though what survives here is too fragmentary to say with certainty. The survey was compiled by Denis Power and uploaded to the record in August 2011.

The site sits in ordinary pasture, and the interior slopes gently downward toward the centre, a detail only noticeable once you are standing inside the bank. The fosse is easiest to read on the eastern and northern sides, where the ground depression is still physically distinct rather than merely damp. The iris line is most rewarding in late spring or early summer when the plants are in flower, giving the old ditch a brief and accidental visibility. The bank, where cattle have not worn it back to almost nothing, is most legible on the western side. As with many such sites in active farmland, access would require landowner permission, and the surrounding pasture should be treated accordingly.