Known in Irish as a rath, this type of monument is one of the most common archaeological features in Ireland, with an estimated 40,000 or more surviving across the country. They are typically circular enclosures defined by one or more earthen banks and ditches, and were used during the early medieval period, roughly between the fifth and twelfth centuries, as farmsteads or settlement sites for individual farming families. That familiarity, paradoxically, is part of what makes any single example easy to overlook.

Raths like the one at Ballyduneen were the basic unit of rural life in early medieval Ireland. The enclosing bank offered protection for livestock as much as for people, and the interior would have held a house, outbuildings, and the everyday apparatus of a farming household. In the folk tradition that developed long after they fell out of use, ringforts became associated with the supernatural, regarded as the dwelling places of the sí, or fairy folk, which meant that many were left untouched by farmers who might otherwise have levelled them for agricultural convenience. That reputation has preserved a remarkable number of them into the present day, scattered through fields and hedgerows across every county in Ireland, Clare included.