One of them, at Carhan, has fared less well than the others. A trackway put through in the 1950s levelled the southern portion of its enclosing bank, and what survives now is a partial thing, legible in some sections and almost invisible in others.

The site is a univallate rath, meaning it was defined by a single enclosing bank and ditch rather than the multiple concentric rings found at more elaborate examples. These earthwork enclosures are the most common monument type in the Irish landscape, built predominantly in the early medieval period as farmsteads for individual family groups. At Carhan, the bank and its external fosse, a shallow defensive or boundary ditch, are best preserved between the western and northern sides. The bank itself still rises to an external height of 1.5 metres and measures 2.3 metres wide, with some stone facing visible in places along its flanks, though this appears to be a later addition rather than original construction. On the eastern side, the fosse, which is 2.2 metres wide, has been re-cut at some point to serve as a field drain, a practical repurposing that has further obscured its original form. Within the interior, the south-western quadrant holds a low, sod-covered stony mound with a central depression about 4.1 metres across, interpreted as a possible hut site. Older Ordnance Survey maps mark a feature labelled 'Cave' in this same quadrant; the archaeologist Henry, writing in 1957, identified this as a souterrain, an underground stone-lined passage typically used for storage or refuge. No visible trace of it remains above ground today.