It rises only thirty centimetres at its highest point, spreading roughly seven metres from north to south and six metres from east to west, with a roughly circular outline. What marks it out, aside from its prehistoric origins, is a central depression set slightly below the crest of the mound, measuring about two metres by one metre. That hollow is the kind of detail that quietly suggests something deliberate, something removed or disturbed, though the record does not say what.

The mound sits on a limestone reef, the same band of exposed bedrock that supports a companion site in the same field. In Irish archaeology, cairns of this type, stone-filled earthen or rubble mounds, are generally associated with Bronze Age burial practice, though without excavation it is impossible to say with certainty what purpose this particular example served or how old it is. The area was surveyed by Michael Connolly as part of a wider study of the Lee Valley in 1996 and 1997, and it is through that survey that this quietly anomalous little mound entered the formal record at all.