A cashel is simply a ringfort built from dry-stone walling rather than earthen banks and ditches, and they are particularly associated with the rocky terrain of the west of Ireland, where loose field stone was abundant and earth ramparts less practical. Thousands of ringforts survive across Ireland, built roughly between the early medieval period and around 1000 AD, and most are thought to have served as enclosed farmsteads, protecting a family's dwelling and livestock from opportunistic raiding rather than from organised military attack.

Beyond its classification and location, the specific history of this particular cashel at Carrahan remains, for now, unrecorded in any publicly accessible form. What can be said is that Clare's Burren region and its surrounding areas contain a remarkable concentration of stone monuments from the early medieval period, a reflection of both the geology and the long continuity of farming in the area. Cashels of this type were typically the homes of free farmers or minor lords, their circular walls sometimes several metres thick and accompanied by an internal souterrain, an underground stone-lined passage used for storage or as a place of refuge. Whether any such features survive here is not yet known from available sources.