That detail alone suggests this was once a working farmstead, a place where people ground their daily bread within or beside a defended enclosure that is now barely legible in the landscape.

The site is a univallate rath, meaning it was enclosed by a single earthen bank rather than the double or triple rings that mark higher-status settlements. Ringforts of this type were the most common form of rural settlement in early medieval Ireland, typically housing a farming family and their livestock. At Lerrig the enclosing bank is around six metres wide and rises only a metre above the interior and a metre above the surrounding ground, so the structure is considerably flattened from whatever height it originally reached. The interior measures roughly 26 metres across in both directions, a fairly typical size for a domestic rath. The 1897 Ordnance Survey map recorded a fieldbank running along the western side of the monument, but that feature has since vanished; a different fieldbank now runs north to south along the eastern side. These shifting boundaries are a reminder of how continuously agricultural land management has rearranged and obscured early features across the Irish countryside. The complete rotary quern recovered nearby, along with the upper stone of a second, is the most tangible human trace the site has yielded, a pair of objects worn smooth by the repeated effort of grinding.