What was once a complete oval enclosure has been cut through by a forest track, and the southeastern quadrant is simply gone. What remains is a semicircle, roughly half of something that was once whole, and yet it is precisely this condition of incompleteness that makes the site quietly arresting. It does not announce itself.

Ringforts, which are enclosed farmsteads typically dating from the early medieval period, are among the most common archaeological monument types in Ireland, but they vary considerably in form and survival. The one at Ballyedmonduff was recorded on the 1843 Ordnance Survey six-inch map as an oval enclosure with internal dimensions of approximately 34 metres by 28 metres. More unusually, that same map shows three internal divisions within the enclosure, suggesting a more complex internal layout than a simple single household. The surviving northern portion, with an internal diameter of around 21 metres, is enclosed by a bank of earth and stone roughly 1.3 metres wide and 0.6 metres high. An opening in the northeast, about 2.5 metres across, may represent the original entrance. To the south of the main enclosure lies a separate open-ended enclosure, recorded as a related but distinct feature. The site was compiled by archaeologists Geraldine Stout and Padraig Clancy, with details revised as recently as July 2018.

Access involves navigating the forestry plantation on the eastern slopes of Three Rock Mountain, which sits within the Dublin Mountains to the south of the city. Forest tracks can be confusing and the landscape does not always offer clear sightlines, so a map or GPS coordinates are worth having before you set out. The surviving bank is low and vegetation can obscure it depending on the season, so late autumn or winter, when ground cover is thinner, gives the clearest sense of what remains. The open-ended enclosure to the south is worth locating separately, as the relationship between the two features raises questions that the site itself does not answer.