The shape is sub-circular, roughly 40 metres from north to south and 35.5 metres from east to west, and it is the kind of feature that a casual walker might cross without registering as anything more than a slight rise in the ground. What makes it quietly interesting is a detail at the western side, where the bank widens and thickens into a distinct mound. That asymmetry is the sort of thing that tends to prompt questions rather than answer them.

Enclosures of this general type, defined by a raised earthen bank encircling an interior space, appear throughout Ireland across a broad sweep of prehistory and early medieval period. They served many purposes: settlement, agriculture, ritual, or the enclosure of livestock. The mound formed by the widening bank at the western end here does not fit the neat pattern of a simple field boundary, and it is the kind of irregularity that archaeologists note carefully. County Louth, lying in the north-east of Ireland along the ancient corridor between Ulster and Leinster, has a dense concentration of such earthwork remains, many of them poorly understood and easy to overlook in a landscape that has been farmed continuously for millennia.