A rath, or ringfort, is an enclosed settlement dating broadly from the early medieval period, typically defined by one or more earthen banks and ditches arranged in a rough circle. They were once the homes of farming families, the bank and ditch serving less as serious military fortification and more as a boundary marking status and providing some protection for livestock. Ireland contains thousands of them, yet each occupies a specific place in a specific piece of ground, and this one is in Corratanvally.

Beyond its classification and its county, the documentary record for this particular site is, for the moment, thin. What can be said with confidence is that ringforts of this type were in use roughly between the fifth and twelfth centuries, and that their distribution across Mayo reflects the dense agricultural settlement of the early medieval Irish countryside. The townland name itself, Corratanvally, is worth a moment's attention. Townlands are among the oldest units of land division in Ireland, many of them preserving traces of Gaelic territorial organisation that predate the Norman period entirely, and the names often encode something of the terrain, the vegetation, or the families who once worked the ground.