A cairn, in its simplest definition, is a mound of stones, often raised over a prehistoric burial or used to mark a significant point in the landscape. They appear across Ireland in considerable numbers, ranging from modest field clearance heaps to substantial Neolithic passage tombs. Which category this particular example belongs to remains, at least in accessible documentation, an open question.

The place name An Corrán Buí translates loosely from Irish as the yellow sickle or crescent, a topographical name that likely describes some curve in the land, a river bend, or a distinctive ridge. Mayo as a county is rich in prehistoric monument types, from the court tombs of the north to the remarkable Céide Fields, where Neolithic field systems were preserved beneath blanket bog for over five thousand years. Where exactly this cairn fits within that longer story of human activity in the region is something the surviving record has not yet made clear in any detail that can be responsibly passed on.