A slight rise in a County Kildare pasture is all that announces this early medieval enclosure near Dunmurry, and even that subtlety is easy to miss. What sits there is a platform ringfort, a variety of rath in which the interior ground level was deliberately raised or simply retained as the surrounding land settled lower over centuries, leaving a low, circular shelf of earth. This one measures roughly 29 metres across on its north to south axis, a modest but typical diameter for the type, and its interior slopes gently downward from north to south, a detail that suggests either deliberate construction or the slow work of drainage and settlement across many hundreds of years.

The site was formally recorded in 1972, when it was described as circular in plan with a depression noticeable in its southern half, interpreted at the time as the result of relatively recent digging, perhaps an opportunistic excavation or simple land disturbance rather than anything more deliberate. Ringforts of this kind were built throughout Ireland during the early medieval period, broadly between the fifth and twelfth centuries, and functioned primarily as enclosed farmsteads, the raised or banked interior offering a degree of protection for a family, their livestock, and their stores. By 2011 the field around the Dunmurry example had been brought into tillage, and the earthwork remained visible from aerial imagery, its circular outline still readable against the cultivated ground even after a millennium of agricultural activity pressing in from every side.