The ground here has been so thoroughly levelled over the centuries that the ringfort, a type of enclosed farmstead common across early medieval Ireland, survives only as a faint set of landform clues: a circular area roughly thirty metres across, where a gentle undulation traces the line of what was once a substantial earthen bank, and a scarp still standing about two metres high along parts of the circuit.

Ringforts, known in Irish as raths when formed from earthen banks rather than stone, were the standard unit of rural settlement in Ireland from roughly the fifth to the twelfth centuries. They typically enclosed a family's dwelling, outbuildings, and sometimes livestock, with the surrounding bank and ditch providing a degree of security and social definition. The example at Clashmaguire sits on a south-facing slope, just below a shelf of more level ground, a positioning that would have offered both drainage and a degree of shelter. What makes it particularly readable, despite its degraded state, is the survival of cultivation ridges crossing the southern half of the interior on an east-west axis. These ridges are the physical memory of later agricultural use, ploughing or spade-work that cut across the old enclosure long after whoever built it had gone, and which paradoxically helps modern observers confirm the site's original shape and extent.