Sitting on the south-eastern slope of a low rise in undulating pasture in Corraun, County Mayo, this ringfort, known in Irish as a rath, retains much of the layered defensive logic that defined early medieval rural settlement in Ireland. A rath is a roughly circular enclosure formed by earthen banks and ditches, used as a farmstead by a family of some local standing, typically between the sixth and twelfth centuries. Here, the main enclosure measures roughly 45 metres north to south and 44 metres east to west, which places it comfortably within the middling range for such sites.

The earthworks themselves tell a specific story of construction and intention. An inner bank, standing around 0.6 metres high, defines the core enclosure. Beyond it lies an external fosse, a defensive ditch, running to a depth of 2.1 metres on the northern to south-western arc. A second, outer bank rises to approximately 0.8 metres along the same stretch. That combination of bank, ditch, and outer bank gives the site a double-rampart character that would have made casual entry uninviting. The main entrance is on the eastern side, where a causeway 3.6 metres wide crosses the fosse; a narrower gap of 1.7 metres breaks the inner bank to the north-west, possibly a secondary access point or a later alteration. Inside the enclosure, the traces of two subrectangular hut sites survive as low earthen banks, their rectangular outlines just legible in the ground. These are the ghosted footprints of actual domestic structures, the buildings where people slept, stored goods, and kept animals through the long wet winters of early medieval Connacht.