What was once a substantial enclosure, roughly 69 metres north to south and up to 90 metres east to west, has been progressively dismantled by the practical needs of farming: sections of its perimeter levelled, its interior divided, its scarps repurposed as field fences. What remains is fragmentary but legible if you know what to look for. The western and northern arcs survive as low stony scarps, the tallest reaching about 1.2 metres, while the south-eastern side has been almost entirely flattened, leaving only a faint undulation in the ground. The original entrance is thought to have been somewhere along that now-lost eastern or south-eastern arc.

The enclosure was already being eroded by the time anyone thought to map it systematically. The 1838 Ordnance Survey six-inch map records it as an oval feature, but by the 1920 edition only the western third was shown, the rest presumably having disappeared into field boundaries by then. The townland boundary between Ballynabrehon South and Corbally runs directly through the site on a north-north-west to south-south-east axis, which suggests the enclosure was already ancient and inert when that boundary was fixed. Two later field fences now cross the interior at perpendicular angles, and a concrete water tank has been installed in the south-western quadrant, its construction platform likely responsible for a gentle slope in the ground nearby. A curious feature adds to the complexity: a low subrectangular platform, about 15 by 10 metres and rising to 1.5 metres, abuts the eastern side of the enclosure. Its relationship to the enclosure and its original purpose remain unclear.

The site sits high enough that Croagh Patrick is visible on the western horizon, and the views south and south-west are extensive. That elevated, exposed position on the ridge may itself be meaningful; enclosures of this kind were often deliberately placed on prominent ground, though without excavation it is impossible to say whether this one was used for settlement, stock management, or something else entirely. The landscape has swallowed most of the evidence, and what persists is a puzzle the ground has not yet chosen to solve.