What makes this rath quietly compelling is not its size, which is modest, measuring roughly 32 metres on its longer axis and just under 25 metres across, but the layered evidence of how the site has been used, altered, and quietly absorbed into the working landscape around it.

A rath is an early medieval farmstead enclosure, typically constructed between the sixth and tenth centuries, consisting of a raised earthen bank, sometimes with a surrounding ditch or fosse, enclosing a domestic area where a farming family would have lived and kept livestock. The Ardmore example was already recorded as a circular earthwork on the Ordnance Survey six-inch map of 1837, and when the monument was formally described in 1970, surveyors found a steep inner bank, a fosse, and traces of an outer bank, best preserved along the northern and north-eastern arc. The interior rises gently from the edges toward a level central area, and faint traces of cultivation ridges suggest the enclosed ground was at some point turned over for tillage rather than left as a yard or habitation space. In the northern quadrant, there is what may be a hut site, a possible remnant of the original structure that once stood within the enclosure. The monument was placed on the Register of Historic Monuments in February 1975.

What the site also shows is how earthworks accumulate meaning across centuries. Modern gaps in the bank at the south-south-west, north-west, and north have been cut through for agricultural access, and a later deposit of earth has built up against the outer foot of the bank across much of the eastern and southern arc. A later low broad bank extends outward from the south-south-west, suggesting the site continued to be modified and incorporated into field systems long after its original purpose had been forgotten. Aerial photography still picks it out clearly as a tree-lined ring, the vegetation following the old earthwork like a memory the land has not quite let go of.