Known in Irish as a ráth, a ringfort is a roughly circular enclosure defined by one or more earthen banks and ditches, constructed during the early medieval period, broadly between the fifth and twelfth centuries. These were the farmsteads of their age, home to a single family and their livestock, and they survive across Ireland in their thousands, though many have been worn down by centuries of ploughing, grazing, and general agricultural use. That so many persist at all is largely because of a persistent folk belief associating them with the otherworld and with bad luck for anyone who disturbs them.

Beyond its classification as a rath and its location in Colladussaun, the specific details of this particular site remain largely inaccessible at present. The documentation has not yet been made publicly available, which places it among a number of Mayo monuments whose individual histories, dimensions, and conditions are still waiting to be formally set out. What can be said is that Mayo contains a considerable concentration of early medieval earthworks, and that townlands like Colladussaun, with their layered Gaelic place-name histories, frequently preserve traces of settlement patterns stretching back well over a thousand years. The name Colladussaun itself is the kind of anglicisation that often masks older Irish forms describing local geography, land quality, or long-forgotten personal names.