Ringforts, known in Irish as ráth or lios depending on their construction, are among the most common archaeological monuments in Ireland, with estimates suggesting around 40,000 once existed across the island. They served primarily as enclosed farmsteads during the early medieval period, roughly 500 to 1000 AD, their circular earthen banks defining the domestic world of a family or small community. The one at Drumullan belongs to this vast, quiet category of sites that shaped the rural geography of Ireland more thoroughly than almost any other monument type, yet individually each one tends to slip beneath notice.

The specific history of this particular enclosure, its dimensions, condition, any finds associated with it, and the shape of its earthworks, remains formally undocumented in publicly accessible records at present. What can be said is that the townland name Drumullan derives from the Irish, likely containing the element droim, meaning a ridge or long low hill, which is precisely the kind of elevated ground that early medieval farmers preferred when selecting a site. The slight rise would have aided drainage, given some natural defensibility, and made the enclosed space visible across the surrounding farmland. Clare as a county contains a substantial number of such sites, scattered across its varied terrain of limestone plain, drumlin country, and coastal edge.