What makes the Moher rath unusual is not dramatic visibility but the precision with which its defensive layers have survived: a scarp, a fosse, and an outer bank arranged concentrically, each element serving a distinct purpose in the original design.

A rath is an Early Medieval ringfort, typically dating from somewhere between the fifth and twelfth centuries, and this one at Moher preserves the full sequence of enclosure in measurable form. The inner scarp stands 1.36 metres high. Beyond it runs a fosse, the ditch that would have made any approach more difficult, here 2.1 metres wide and a metre deep. An outer bank, with a base spread of 5.8 metres and a crest width of 1.5 metres, forms the outermost ring. The whole enclosure measures approximately 35 metres across in both its north-south and east-west axes, making it a fairly typical example of its class in terms of scale. The only significant deterioration is in the south-west quadrant, where the outer bank has been worn down over time, likely through a combination of agricultural pressure and weathering on the most exposed side of the site.

The interior is currently inaccessible due to dense vegetation, which means the earthworks are best appreciated from the surrounding field margin, where the relationship between scarp, fosse, and bank reads most clearly as a system rather than as isolated bumps in the ground.