The name conjures something grander than what survives: a modest bank and a shallow external fosse, the fosse being a defensive ditch dug around an enclosure, tracing an oval roughly 71 metres east to west and 56 metres north to south. Traces of an internal fosse are also visible along the northern to eastern arc. Field boundaries cut across it at the north-west and south-west, the kind of agricultural intrusion that has quietly dismantled countless such monuments over the centuries.

The fort name, colourful as it is, may be misleading. Writing in 1914, a local observer named Neary suggested the enclosure may have been a pinfold, which is a small enclosure used to impound stray livestock until their owners paid a fine to reclaim them. It is a prosaic function, and a plausible one. Pinfolds were a practical fixture of rural life across Ireland and Britain, and an oval earthwork of this scale, set in marginal wet ground at the edge of grazing land, fits that purpose as well as it fits any martial one. The Race Park label almost certainly derives from the proximity of a field or townland associated with horse racing, a common enough local naming convention, rather than from anything the enclosure itself was built for.