Known in Irish as a rath, a ringfort is one of the most common monument types in Ireland, typically a circular enclosure defined by one or more earthen banks and ditches, built during the early medieval period roughly between the fifth and twelfth centuries. They served as farmsteads for free farming families, the banks offering a degree of protection for livestock and household rather than functioning as true military fortifications. That so many survive across the country is largely because of a deep-rooted folk belief associating them with the fairies, which discouraged generations of farmers from levelling them.

The Knocknaraha example belongs to this broad and ancient tradition, occupying a corner of Clare that retains a scattered distribution of such earthworks across its drumlin fields and limestone plains. Clare itself is county-rich in prehistoric and early medieval remains, from the Burren's megalithic tombs to the numerous raths that punctuate its rural parishes. The townland name Knocknaraha is itself suggestive, deriving from the Irish for the hill of the rath, which implies the monument was prominent enough in the local memory to shape the very name of the place long before any formal archaeological record was kept.