The rath at Cloontagh in County Longford is more ambiguous. It sits on a low rise in pasture, its roughly subcircular outline measuring about 34 metres north to south and 32 metres east to west, but the boundary is defined not by a proper fosse (the encircling ditch typical of these sites) but by a scarp ranging from just 20 centimetres to 70 centimetres in height, supplemented by a curving field bank and drain. There is no surviving fosse at all, and no recognisable original entrance. The site reads less like a fortification and more like a faint memory of one.

What makes the Cloontagh rath particularly curious is the feature at its centre: a low circular mound of earth and stone, roughly 5.7 metres in diameter and no more than 20 to 30 centimetres high. Such internal mounds within ringforts are not unheard of, but they remain poorly understood. They may represent the platform of a vanished structure, a deliberately raised working area, or occasionally something with a ritual function, though evidence from any individual site rarely points firmly in one direction. At Cloontagh the mound is subtle enough that a casual walker might dismiss it as a natural irregularity in the ground, which is part of what makes the whole enclosure worth attention. The earthworks have survived not through dramatic preservation but through the quiet persistence of pasture farming, which tends to compress rather than destroy ancient features.