It was recorded as a barrow in 1986, the term used for a prehistoric burial mound, typically a rounded heap of earth or stone raised over a grave or graves. But by 1995, that confident classification had softened: a later survey described it only as a possible mound, a distinction that speaks less to what the feature is and more to how little can be said about it with certainty.

The reclassification came not from new excavation or fieldwork but from aerial photography. Images taken in 1973 by the Geological Survey of Ireland were examined, and what they showed was ambiguous enough to prompt a more cautious label. This is not unusual in Irish field archaeology. From the air, the difference between a deliberate prehistoric construction and a natural undulation in the land can be genuinely difficult to read, and forestry complicates matters further, obscuring ground-level detail and making direct inspection awkward. The site at Athdown sits precisely in that grey zone, acknowledged in the record but unresolved.