Ringforts, known in Irish as raths or lios depending on the region, were the standard farmstead enclosure of early medieval Ireland, roughly from the fifth to the twelfth centuries. A family would have lived, worked, and kept livestock within the raised ring, which offered a degree of protection and a clear statement of territorial occupation. Clare has an exceptionally dense concentration of them, and many survive as little more than a slight rise in a field, easy to walk past without recognising what you are looking at.

Beyond its classification and location, the specific history of this particular site remains, for now, unrecorded in any publicly accessible form. No excavation findings, no associated placename folklore, and no documented history of the enclosure itself are currently available. That absence is itself a kind of fact: the vast majority of Irish ringforts were never excavated and exist only as earthworks, their domestic lives entirely unrecovered. What can be said with confidence is that Drumullan, like most Clare townland names, preserves an older Irish form in its syllables, and that the fort would have been a working part of that early agricultural world before gradually falling out of use and into the grass.