Three sides of this oblong enclosure, roughly 82 metres east to west and 48.5 metres north to south, are defined not by human construction but by the naturally steep, rocky faces of the spur itself. Only along the south-west to north-west arc did builders need to intervene, raising a substantial scarp to a height of around 2.7 metres. On top of the naturally occurring scarps to the south and north-east, a low stone bank or wall, sod-covered and now standing only 0.4 to 0.55 metres internally, completes the circuit. The probable entrance lay at the east-south-east. It is the kind of place where the distinction between engineered and natural landscape quietly dissolves.

Enclosures of this type, which used a combination of constructed banks and the lie of the land to define a bounded area, appear throughout early medieval Ireland and were put to a range of uses, from settlement to agriculture to stock management. Here, the internal area slopes downward from north to south, and in the south-east quadrant two possible hut sites have been identified, suggesting that people lived or worked within this space at some point. A modern field boundary running roughly north-north-west to south-south-east now cuts through the enclosure, dividing it into two unequal portions, a reminder that later agricultural patterns were laid down with little regard for whatever came before.