It is a rath, one of thousands of ringforts scattered across the Irish countryside, and it survives here as a low earthen bank with an external fosse, the term for the ditch that runs around the outside of the enclosure. The bank and ditch together formed a boundary that would once have defined a farmstead, likely dating from the early medieval period, roughly between the fifth and twelfth centuries, when this type of enclosed settlement was the dominant form of rural habitation in Ireland.

Ringforts, despite their name, were not primarily military structures. They were the homesteads of farming families, the bank and fosse serving to keep livestock in and predators or opportunistic raiders out. The circular form was almost universal, and the size of a given fort often reflected the status of its occupants, with larger and more elaborate examples, sometimes featuring multiple concentric banks, associated with higher-ranking individuals. The Kilpatrick example, at around 44 metres in diameter, falls within the typical range for a single-banked enclosure of this kind. What makes its survival notable is that it remains legible in the landscape at all. A great many Irish ringforts were levelled during land clearances and agricultural intensification over the past two centuries, and those that persist in grassland, undisturbed by ploughing, retain a presence that tillage long ago erased elsewhere.