This is a rath, the Irish term for a ringfort, the most common monument type in the Irish countryside. Ringforts were enclosed farmsteads, typically built between roughly 500 and 1000 AD, where a family lived, kept livestock, and worked the surrounding land. The enclosing bank was less about military defence and more about demarcating space, signalling ownership, and keeping animals in or out.

The Ballynahaha example sits at the northern edge of a natural terrace on a north-facing slope, a position that would have offered good drainage and a clear outlook over the surrounding ground. The enclosure is roughly circular, around 40 metres in diameter, and survives in reasonable structural form. The earthen bank stands about half a metre above the interior and rises to around 1.3 metres on the outer face. Beyond it, to the southeast and southwest, runs a fosse, a shallow external ditch roughly three quarters of a metre wide and 20 centimetres deep, accompanied by a slight counterscarp bank at the southeastern arc. The counterscarp is a low secondary bank thrown up on the far side of the ditch, a detail that adds a modest extra degree of enclosure on that side. The site was recorded and compiled by Denis Power, with notes uploaded in August 2011.

The interior is entirely covered in dense overgrowth, which means there is little to see once inside the bank, though the earthworks themselves are legible enough from the perimeter. Visitors approaching from the east will notice where the field boundary meets the bank at the southeast, a practical illustration of how agricultural boundaries have been overlaid on much older ones over the centuries. The surrounding pasture keeps the outer profile visible, particularly along the southern arc where the fosse is most pronounced. There is no formal access or signage, and the adjacent bungalow is a reminder that this is private farmland, so any visit should be made with appropriate consideration for the landowner.