Where the more familiar ráth was constructed by piling up soil and sod to form a circular enclosure, a cashel achieved the same end with whatever stone lay nearest to hand. In the limestone-rich landscape of Clare, that meant a great deal of stone, and the county retains a remarkable number of these structures, many of them quietly present in fields that have been farmed around them for centuries.

Ringforts in general date predominantly from the early medieval period, roughly the sixth to the twelfth centuries, and were the homesteads of farming families across Gaelic Ireland. The cashel form is particularly associated with the west of Ireland, where glacial activity left the ground stony and timber scarce. The name Finanagh itself suggests a place with older associations, possibly connected to a personal name or an early ecclesiastical figure, though the precise etymology is a matter for local scholarship rather than confident assertion here. What is clear is that a structure of this kind would have been the centre of a small agricultural household, its thick stone walls offering shelter for people and livestock alike, and perhaps a degree of social status in a world where the size and solidity of one's enclosure carried meaning.