What makes it quietly odd is the gap between what was once recorded and what now survives. The Ordnance Survey's third edition six-inch map, published in 1930, showed a large circular platform roughly ninety metres across, its outline traced by hachures, those small slope-indicating marks used by cartographers to suggest the edges of raised ground. On the ground today, the visible enclosure measures only around forty metres in diameter, defined by a low scarp barely a metre high. Whether the rest was already fading when the map was made, or whether the surveyor captured something that has since collapsed further into the soil, is not easily answered.

What remains is a palimpsest of earthen features laid one over another. Along the northern arc, a low earthen bank appears to overlie the scarp line before veering away to the east, suggesting that different phases of construction or modification have blurred the original form. Faint traces of a fosse, a defensive or boundary ditch dug around an enclosure, are still discernible along the southern and western sides, and the faint shadow of a possible outer bank is visible beyond it. A second associated enclosure lies nearby, hinting that this was not an isolated feature but part of a wider pattern of use or settlement in the landscape. Circular enclosures of this kind are common across Ireland and are variously interpreted as the remains of ringforts, farmsteads, or enclosures of uncertain date and function; without excavation, Corralough offers no easy answer.