What makes this particular example worth pausing over is the small but telling evidence of how the modern world has gradually pressed in on it. A field boundary that once ran immediately outside the bank along the north-western arc, visible on a 1923 Ordnance Survey six-inch map, has since been removed, and the material from it dumped against the outer face of the bank to the west, quietly altering the very profile that archaeologists use to understand these structures.

The site is a rath, the Irish term for a ringfort, which was the most common form of rural settlement in early medieval Ireland, typically dating from roughly the fifth to the twelfth century. A rath consists of a roughly circular area enclosed by one or more banks of earth and stone, and would originally have sheltered a farmstead and its inhabitants. This example at Boolaglass measures approximately 29.5 metres in diameter, enclosed by an earth-and-stone bank that stands around 1.1 metres on the interior face and 1.25 metres on the exterior. The northern arc of the bank is the best preserved section, while briar growth now masks much of the circuit. The interior slopes gently downward to the west. The site was recorded and compiled by Denis Power, with details uploaded to the national record in August 2011.

The ringfort sits within pasture, so access depends on landowner permission, as is the case with the vast majority of such sites across the country. The northern arc is the most rewarding section to examine closely, where the bank retains something closer to its original form. The briars that cloak much of the remainder make a careful approach worthwhile, and the dumped field boundary material along the western face is a useful reminder that even sites that look undisturbed have often been subject to incremental change. The 1923 OS six-inch map, freely available through the Ordnance Survey Ireland online viewer, is worth consulting beforehand to appreciate just how much the immediate surroundings have shifted in the intervening century.