The detour is not accidental. It bends to avoid a roughly circular earthwork that has been sitting on this north-facing hillside long enough to have become, for the people who live and work beside it, simply part of the landscape to route around rather than through. That quiet deference tells you something about how these sites persist.

The earthwork is a rath, the Irish term for a ringfort, which is the most common archaeological monument type in the Irish countryside. Ringforts were typically enclosed farmsteads, built and occupied during the early medieval period, roughly between the fifth and twelfth centuries. This particular example in Ballyroe East is modest in scale, roughly circular with a diameter of about twenty-five metres. Its defining feature is a scarped edge, essentially a cut into the slope of the hillside to create a sharp internal face, which reaches about 1.7 metres in height and some fourteen metres in width at its most pronounced. Beyond that scarp runs an external fosse, a shallow ditch, and beyond the ditch a counterscarp bank, the low outward-facing ridge of material thrown up when the ditch was originally dug. The counterscarp survives to an external height of around 1.1 metres on the north-west to south-east arc, though at the north end it has been obscured by dumped material at some point in the site's more recent history. The monument was recorded by Denis Power and the record uploaded in August 2011, with aerial photographs taken in March 2006 providing additional documentation.

On the ground, the north-west to north-east arc of the scarp is the clearest and most readable section. Elsewhere the profile softens and becomes harder to distinguish from the general slope of the hillside. The south-east quadrant of the interior is heavily overgrown with brambles and nettles, which also obscure the enclosing element in that area, so any sense of the full circuit requires some patience and a willingness to read the topography rather than expect a clean bank. The interior itself slopes gently down to a shallow hollow just east of centre. Ground immediately east of the enclosure is marshy, which is worth knowing before stepping off in that direction. A field boundary that once abutted the monument at the north-east, visible on the 1924 Ordnance Survey six-inch map, has since been removed, leaving the site slightly more isolated in the pasture than it once appeared on paper.