It is not ruined so much as absorbed, its bank of earth and stone still intact to a height of 1.3 metres and a width of 1.1 metres, enclosing a level interior roughly 14.6 metres across. A large granite boulder rests against the northern terminal of the bank, and a formal entrance gap, just under two metres wide, opens to the south-east. A second break in the SSW is less deliberate, the result of machinery rather than any original design. The trees press in on all sides, and deep ploughing has disturbed the ground within the enclosure itself, leaving the site caught somewhere between survival and erasure.

An enclosure of this kind belongs to a broad category of earthwork monuments found widely across Ireland, typically interpreted as enclosed farmsteads or settlement sites of early medieval date, sometimes called ringforts, a term used loosely for circular or sub-circular enclosures defined by banks and ditches. What distinguishes Ballyedmonduff is its immediate context. Writing in 1975, researcher Healy recorded that hut sites once adjoined what appears to have been a ringfort here, suggesting this was not an isolated feature but part of a small cluster of related activity, a domestic landscape tucked into the hillside above south County Dublin. The mountain itself, Three Rock, takes its name from the distinctive granite tors visible on its summit, and the underlying geology, exposed granite across much of this upland terrain, explains the boulder still lodged against the bank.

Accessing the site requires some navigation through the forestry plantation on the south-eastern slopes of Three Rock Mountain, which forms part of the Dublin Mountains. The surrounding tree cover means orientation can be disorienting, and the enclosure does not announce itself from any distance. The entrance gap on the south-eastern side is the clearest surviving feature and gives the best sense of the original structure, while the displaced boulder at the northern terminal is worth locating for scale alone. The interior ground is uneven from the historic ploughing, so the flat, defined platform that would originally have characterised the enclosed space is largely lost. Dry conditions make the approach considerably easier.