The term earthwork covers a broad range of human-made landscape features, from the raised banks of a ringfort to the ditched enclosures of a ceremonial site, and the Ardrahan area has long been associated with early medieval activity. Without further detail, the structure keeps its own counsel.

Ardrahan itself carries considerable historical weight for a small south Galway parish. It sits in a part of Connacht where the limestone plain of the Burren gives way to more fertile ground, and the area was a seat of the O'Shaughnessy clan through much of the medieval period. Earthworks in this region frequently turn out to be the remains of raths or cashels, the circular enclosures that formed the basis of rural settlement in early medieval Ireland, though some are older still, belonging to Bronze Age or Iron Age activity that left marks on the ground long before any written record. Without specific detail about this particular feature, its age and function remain open questions.