Look more carefully and the geometry becomes deliberate: two concentric earthen banks, a ditch between them, and an interior that dips gently towards the south-east before rising sharply to meet the inner wall. This is a rath, the most common type of early medieval enclosure in Ireland, typically built between the sixth and tenth centuries as a farmstead for a single family or extended household. The double-bank arrangement, known as a bivallate ringfort, placed whoever lived here a small but meaningful step above their single-banked neighbours in terms of both defence and social standing.

The site at Ballynoe was recorded and measured by Denis Power, whose survey notes were uploaded in August 2011. The enclosure is sub-circular, running approximately 26 metres north to south and just over 30 metres east to west. The inner bank is better preserved on its western to north-eastern arc, where its exterior face still stands to around 2.7 metres, but it reduces to little more than a low scarped edge on the north-eastern to south-south-eastern stretch. The outer bank, similarly best preserved to the north-north-west, has been heavily denuded around much of its circuit. The fosse, which is the ditch running between the two banks and here roughly 4 metres wide, survives well along the northern arc but has been filled in further around towards the south-south-east. Notably, the external face of the inner bank shows signs of quarrying at several points on the western and north-north-western sides, which has the effect of making the fosse appear wider than it originally was at those locations.

The site sits in working farmland, so access is not a given and landowner permission would be needed before approaching. The banks themselves are covered in mature trees and bushes, which gives the enclosure a distinctly wooded profile when seen across the surrounding fields and also makes the earthworks harder to read from ground level. The interior, now under ordinary pasture, offers the clearest sense of the original layout: that gentle downward slope to the south-east, cupped within rising edges, is one of those quiet spatial details that only becomes legible once you are standing inside it.