These enclosures, known in Irish as raths, were the farmsteads of early medieval Ireland, typically dating from roughly the fifth to the twelfth century. A bank of earth, sometimes reinforced with a ditch, enclosed a family's dwelling and offered a degree of protection for livestock. Tens of thousands of them once existed across the island, and several thousand survive in some form today, most absorbed into field boundaries or half-erased by ploughing, a few still remarkably intact.

Cloonlaheen itself is a small rural townland in Clare, a county that retains a particularly dense scatter of such earthworks across its limestone plain and low hills. The rath here is one among many in the region, yet each of these sites represents an individual household, a specific patch of ground that someone chose, enclosed, and worked during the early medieval period. The circularity of the form was both practical and, some scholars argue, carried symbolic weight, marking out a family's territory in a visible and permanent way. Over the centuries, raths accumulated folklore as well as archaeology; many were associated with the sí, the fairy mounds of Irish tradition, which gave communities reason enough to leave them undisturbed even when the land around them was being reshaped for modern agriculture.