The field carries the Irish name Cluain Mór, meaning "great meadow", and sits atop an east-west ridge at Knocknageeha. What makes this particular site quietly odd is the density of similar monuments in its immediate vicinity: at least two confirmed ringforts and one probable example lie within roughly 200 metres to the east and south-east, suggesting this corner of north Cork was once unusually intensively settled.

Early surveyors noted the fort clearly. Ordnance Survey six-inch maps from 1842, 1904, and 1937 all depict it as a hachured circular enclosure, and the 1904 edition records its interior as planted. By the time Bowman surveyed it in 1934 and Broker followed in 1937, both described it as a double-ramparted fort on land belonging to a T. O'Keeffe, meaning it once carried an outer earthen bank in addition to the main enclosure wall. That outer rampart has since been levelled entirely. The inner bank survives only in part: an arc running from the south-east to south-west has been absorbed into the modern field fence system, standing about half a metre on the interior side and 1.2 metres on the exterior. A low rise to the north is all that remains of the levelled bank on that side. A shallow external fosse, the defensive ditch that would originally have run around the outside of the enclosure, survives to a depth of about 0.2 metres to the south. The interior, roughly 41 metres in diameter, is mostly under pasture, though the western portion has been brought under tillage, further obscuring whatever archaeology may remain beneath the surface.