What looks at first like a slightly uneven field resolves, on closer inspection, into a carefully engineered enclosure: a roughly circular area just under thirty metres across, bounded by an earthen bank and, where the natural ground falls away more steeply, a scarp face rising to two and a half metres. A shallow fosse, the term for the ditch typically dug outside such enclosures to provide material for the bank, runs along the western to eastern arc.

Ringforts, known in Irish as raths when built from earth, were the most common form of rural settlement in early medieval Ireland, used roughly between the fifth and twelfth centuries. They served as enclosed farmsteads, the bank and fosse providing a boundary against livestock straying, wolves, and opportunistic raiding, rather than functioning as military fortifications in any serious sense. The Cruary example shows several details that speak to considered construction. The interior has been deliberately raised on its southern side to level out the slope, creating a usable platform despite the hillside terrain. There are two breaks in the bank, one to the north-east measuring roughly 1.8 metres wide and one to the west at about 2 metres wide, which are likely the original entrances into the enclosure. The bank itself stands to around 1.35 metres for most of its circuit, with the much taller scarp compensating where the earthwork alone would have been insufficient given the gradient of the hillside.