That boundary separates Tullanacorra to the south from Ballyglass to the north, meaning the rath sits precisely between two named places, belonging fully to neither. It is the kind of detail that quietly reveals how deeply these early medieval enclosures are woven into the landscape's administrative memory, long after their original inhabitants are forgotten.

A rath is a roughly circular raised enclosure, typically built between the sixth and tenth centuries, formed from an earthen platform defined by a scarp, a surrounding ditch or fosse, and one or more outer banks. This example, set on an east-west ridge at the break of slope on a steep south-facing hillside, has a platform measuring around 32 metres across. The scarp drops 2.6 metres on the southern side, where the slope falls sharply away, and the fosse at the south is nearly four metres wide. At the south-east, a ramp-like slope in the scarp, about 2.8 metres wide, most likely marks the original entrance; it descends to a low causeway across the fosse, with a corresponding gap in the outer bank beyond. What makes the site's situation particularly striking is that it is not alone. At least seven other raths have been recorded within 200 to 500 metres of this one, forming a dispersed cluster across the surrounding terrain. Such groupings suggest a community of related farmsteads rather than isolated dwellings, each enclosure perhaps belonging to a single family or household within a wider social network.

The rath is well preserved but not especially easy to read from the inside. Hazel and hawthorn ring it thickly, the eastern half of the interior is open grass, but the western half has been overtaken by blackthorn and brambles and is described as impenetrable. A quarry pit sits immediately outside the northern bank. The views to the south-west, out over a basin of low-lying ground, remain largely open, and it is easy to see why whoever built here chose this particular shelf of ridge.