These circular enclosures, known in Irish as raths, were the farmsteads of early medieval Ireland, typically dating from roughly the fifth to the twelfth centuries. Defined by one or more earthen banks and ditches, they served as defended homesteads for farming families, and Ireland still holds tens of thousands of them, many reduced to faint cropmarks or slight rises in a field. Kilcow's example is among the quieter survivors, the kind of site that registers more as a feeling of the ground being subtly wrong than as anything immediately dramatic.

The rath as a monument type tells us a great deal about how rural Ireland was organised in the centuries before the Norman arrival. A prosperous family might have occupied a fort with multiple enclosing banks, while a simpler single-banked enclosure suggested more modest means. The land around Kerry would have supported cattle-farming communities for whom the rath was both a practical enclosure and a marker of social standing. Kilcow as a place-name has not been extensively documented in surviving historical sources, and the specific history of this particular site, its occupants, its construction date, and its condition over time, remains largely unrecorded in publicly available form.