A rath, as this type of monument is also known, is an enclosed farmstead of the early medieval period, typically defined by one or more raised earthen banks and ditches. They were the homes of farming families in early Christian Ireland, and an estimated forty to fifty thousand of them once existed across the country. Many survive only as faint cropmarks; others, like the one at Carrowlagan, persist as physical features in the ground.

Clare is particularly well supplied with such monuments, its limestone-rich landscape having preserved a remarkable number from the early medieval period, roughly the fifth to the twelfth centuries. The townland name Carrowlagan itself is likely derived from the Irish, with "carrow" coming from "ceathrú", meaning a quarter division of land, a term common in the west of Ireland as a unit of agricultural measurement. Beyond its presence in the landscape and its classification as a rath, detailed records for this particular site have not yet been made publicly available, which places it in a curious category: formally recorded, mapped, and counted among Clare's archaeological monuments, yet not yet fully legible to the curious outsider.