A rath, to use the Irish term, is a circular earthen enclosure, typically dating from the early medieval period and used as a farmstead, its bank and ditch marking the boundary of a family's domestic world. At Cuilmore, that world has been largely erased, and what remains is just enough to suggest what once existed.

The 1837 Ordnance Survey six-inch map recorded a complete circular embanked enclosure on this spot. By the time the 1919 edition was produced, only the western half survived, shown as a semi-circular, hachured form with a diameter of roughly 30 metres north to south, already bisected along its southern edge by an east-west field boundary. That field fence is still there, and it marks a boundary in more than one sense. To the south of it, a shallow arc of bank survives, about 20 metres long, between half a metre and a metre high depending on which side you measure, and roughly 3 metres wide. It is the southern remnant of the original enclosure, and it is largely swamped by gorse and brambles. To the north of the fence, the rest of the enclosure has been levelled entirely, and a farmyard now occupies the ground. The land falls away steeply to the north-east into a small stream valley, which gives a sense of why this particular rise might have been chosen in the first place: a defensible edge, good sightlines, a water source nearby.

What is quietly striking about this site is how precisely the maps document its disappearance. Between 1837 and 1919 the eastern half vanished, and at some point after that the northern portion followed. The surviving bank is easy to miss, half-buried in vegetation, and the farmyard that replaced the interior makes the northern ground feel entirely ordinary. The cartographic record ends up being the most eloquent version of the story.