These circular earthwork enclosures, formed from raised banks and ditches, were the most common form of rural settlement in early Christian Ireland, and tens of thousands of them survive across the country in varying states of preservation. What makes any individual example worth pausing over is precisely that ordinariness, the quiet fact that a farmer or minor chieftain once chose this particular piece of ground, staked out a circle, and built a life within it.

Raths were typically the homes of farming families of some local standing, their banks enclosing a dwelling, outbuildings, and livestock pens. The earthen walls served as much as a social marker as a physical boundary, and the labour involved in constructing them signalled something about the status of whoever commissioned the work. In the landscape of north Mayo, where the terrain runs from boggy lowland to the flanks of the Nephin Beg range, such sites tend to survive well precisely because the land around them was never heavily ploughed or redeveloped. The townland name Lahardaun derives from the Irish leath-ardán, meaning a half-height or small plateau, which suggests the kind of slightly elevated, well-drained ground that early medieval settlers consistently favoured when choosing where to build.