A curving arc of earthen bank, running roughly thirty-six metres north to south, sits on a west-facing slope near the crest of a low rise, now pasture. The bank itself is modest, nine metres wide but barely thirty centimetres high on its outer face, and it defines only the western and north-western portion of what would have been a roughly circular enclosure. Across the field boundary to the east, nothing remains at all.

Ringforts, also known as raths, were the most common type of rural settlement in early medieval Ireland, typically consisting of a circular area enclosed by one or more earthen banks and ditches, used as a farmstead or family compound. This one was already being mapped as a complete circular enclosure, approximately forty metres in diameter, on the Ordnance Survey six-inch map of 1846. By the time the same survey was revised in 1894, only the western half was being marked, suggesting that the eastern portion had already been lost or substantially reduced. Local knowledge fills in the rest of the story: the site was levelled in the 1990s, accounting for the near-total disappearance of the eastern half. The fort may also be identifiable as the one recorded in the 1840s under the name Parknalassa fort, noted at that time as lying in the southern part of Breanshagh townland.