What was once a clearly defined circular enclosure, visible on Ordnance Survey maps as late as 1936, was levelled in 1971, leaving behind only subtle undulations in the pasture. To the casual eye, the field looks unremarkable. Look more carefully, and a roughly circular area measuring about 27 metres across in both directions begins to resolve itself in the slight rises and dips of the ground.

Ringforts, known in Irish as raths when they take an earthen form, were the typical farmstead enclosures of early medieval Ireland, generally dating from somewhere between the fifth and twelfth centuries. A bank and ditch defined a circular space within which a family and their livestock would have sheltered. At Rathorgan, a scholar named Power, writing in 1923, noted that even by that point a second outer bank had already been levelled, suggesting the site had been losing definition for at least a century before the main enclosure itself was flattened. That outer bank may account for some of the undulations that still appear beyond the main circular outline, faint traces of what was once a more substantial structure. The setting, a natural terrace overlooking a glen to the southwest, is the kind of elevated, sheltered position early farmers consistently chose, giving visibility across the surrounding land while offering some protection from the prevailing weather.