On a low ridge running roughly north-northwest to south-southeast through fertile pastureland near Ballincar in County Sligo, there once stood a ringfort, one of the circular earthwork enclosures that were built in their thousands across Ireland during the early medieval period, typically serving as enclosed farmsteads for a single family or small community. Today, nothing of it remains visible at ground level.

What we know comes from cartographic evidence rather than any physical trace. The fort appears as a circular enclosure on the Ordnance Survey six-inch map of 1837, and again on the 1940 edition of the same series, suggesting it was still recognisable, at least in outline, well into the twentieth century. Between those two surveys and the present, the site was lost entirely, most likely to agricultural improvement of the kind that quietly erased hundreds of similar monuments across the Irish countryside as pasture was drained, levelled, and made more productive. The ridge itself remains, and the land around it is still good grazing ground, but the rath, as such enclosures are also called, has left no earthwork, no bank, no ditch that a visitor could identify from the surface.