These enclosures, known in Irish as raths, were the farmsteads of early medieval Ireland, typically built between the sixth and tenth centuries. A bank of earth, sometimes accompanied by a fosse or outer ditch, enclosed a family's dwelling and offered a degree of protection for livestock. Tens of thousands of them survive across the country in varying states of preservation, and the example at Cloondaff is among those that have left only the faintest trace in the documentary record.

The specific history of this particular site, including its dimensions, condition, and any finds or features associated with it, has not yet been fully documented in publicly available form. What can be said in general terms is that Mayo has a dense concentration of such monuments, reflecting the intensity of early medieval settlement across the west of Ireland. The rath at Cloondaff belongs to that broader pattern, a remnant of a farming community whose name and story have otherwise not survived. The townland name itself, Cloondaff, likely derives from the Irish cluain, meaning a meadow or pasture, which is precisely the kind of agricultural setting where a rath would typically be found, occupying slightly elevated ground near workable land.