A ringfort, or rath, is one of the most common monument types in Ireland, typically a circular enclosure defined by an earthen bank and ditch, used as a farmstead during the early medieval period. This one at Glengoole survives, but only just.

In its original form, the monument enclosed a circular area roughly 32 metres across, defined by an earth and stone bank with an external fosse, the shallow ditch that would once have reinforced the sense of enclosure. A possible outer bank survives faintly at the northwest. What stands today tells a story of incremental loss. The north and northwest quadrants have been quarried into, leaving a gap some seven metres wide in the bank at the north, and the fosse in that same quarter is buried under generations of field clearance debris, the small stones gathered from surrounding land and tipped against the earthwork over the years. Elsewhere, the enclosing bank has been worn down to little more than a scarp, a low slope in the ground rather than a defined structure. Only the eastern and southwestern sections retain anything close to their original profile, where the bank still rises to about a metre externally and small stones remain visible in its construction. A field boundary cuts across the monument from north to northeast, a detail that neatly captures how thoroughly these ancient enclosures have been absorbed into the working landscape around them.

The site sits on a gentle rise with open views in all directions, which was likely part of the original logic of its positioning. The Slieveardagh hills form a low backdrop to the north, and the elevated ground, modest as it is, would have made the enclosure visible and the surrounding land legible to whoever once lived within it.