The field is still called "fort field" by local people, a designation recorded by Walsh in 1985, and that persistence of local memory is often the only thread connecting the present landscape to whatever earthwork preceded it. A rath, to use the Irish term, is a ringfort: a circular enclosure typically defined by one or more earthen banks and ditches, built during the early medieval period as a farmstead or place of local authority. Thousands survive across Ireland in varying states of preservation, but this one at Farranastig survives mainly as a name, its physical form reduced to a knoll in a grazing field.

The site sits atop a natural rise, which is a location choice consistent with how ringforts were typically positioned, offering a degree of visibility and drainage without requiring the effort of constructing an artificial mound. What makes Farranastig quietly interesting is that a second possible ringfort has been identified roughly 180 metres to the south-west, raising the question of whether this corner of east Cork once held a cluster of contemporary enclosures. Such groupings are not unusual in the Irish landscape, where early medieval communities sometimes established neighbouring farmsteads within sight of one another, though without excavation it is impossible to say whether the two sites were ever in use at the same time.

There is little to guide a visitor beyond the knowledge that the knoll exists in pasture and that local tradition has kept the memory of a fort alive here. The absence of obvious earthworks does not mean nothing remains beneath the surface; many such sites retain subsurface features that only show clearly as crop or soil marks from the air.