On the northern side of a farmyard at Gortdonaghmore sits a ringfort, a type of enclosed settlement that was in common use across Ireland during the early medieval period, roughly between the fifth and twelfth centuries. These circular earthworks, known as raths when formed from earth and bank rather than stone, typically served as defended farmsteads for a single family or small community. This one has not been left entirely to the past: a farm building now occupies its south-eastern quadrant, making it one of those quietly odd cases where centuries of agricultural use have layered themselves directly on top of one another.

The enclosure itself is circular, with a diameter of 34 metres, and is defined by an earthen bank surviving to a height of around 1.5 metres along its southern and eastern arc. The bank has been stone-faced on its outer side and planted with deciduous trees, modifications that suggest ongoing attention to the boundary even as its original defensive or social function faded from memory. That combination of earth, stone facing, and tree planting is fairly typical of how such features were treated by later farming generations, who found it practical to reinforce and vegetate old boundaries rather than remove them entirely.