It is in fact a rath, an early medieval ringfort defined by a raised bank, an external fosse (a defensive ditch dug around the perimeter), and the remains of an outer bank. That outermost layer has been almost entirely lost on the northern and south-eastern sides, leaving the fort's defences incomplete, but the core structure survives in fair condition, measuring roughly 44 metres across on its north-south axis.

Raths are among the most common monument types in the Irish countryside, numbering in the tens of thousands nationally, and most are thought to date from the early medieval period, broadly between the fifth and twelfth centuries. They served as enclosed farmsteads for families of some local standing, their earthen banks marking out a domestic and agricultural territory rather than a purely military one. This example sits within the grounds of Ashford House, which means its survival owes something to the relative protection that demesne land can offer, even if the woodland has been allowed to encroach heavily. Three paths now cut across the monument at the north, east-north-east, and south, suggesting the rath has been absorbed quietly into the estate's circulation routes without anyone necessarily registering what lies beneath the leaf litter and overgrowth.