What survives is roughly half of the original circuit, a sub-semicircular arc of earthen bank with a shallow exterior fosse, sitting in low-lying ground and bordered to the south by a wedge of marshy land. The Irish name, Lisroe or Lios Rua, meaning the russet ringfort, suggests the site was distinctive enough in the local landscape to earn its own colour.

Ringforts, known in Irish as raths or lisses, were the most common form of enclosed settlement in early medieval Ireland, typically enclosing a family farmstead within one or more banks and ditches. This example at Bromore is univallate, meaning it had a single enclosing bank, with an internal diameter of approximately 45 metres east to west. The surviving bank stands 1.8 metres on its exterior face and 1.2 metres on the interior, with an average base width of around 4 metres. The exterior fosse, a shallow defensive ditch running alongside the outer face of the bank, measures roughly 0.8 metres wide and 0.5 metres deep, and is now only faintly visible. A fieldbank running from the south around to the south-west and west may represent a further fragment of the original enclosure, and an earthen ridge extends eastward from the surviving bank's end-curve. Five breaks are visible in the bank, though none appears to be an original entrance; all are likely later disturbances. The road that bisected the site has ensured that the northern and eastern portions of the rath are gone entirely, leaving only this compressed remnant to suggest the full scale of what once stood here.