Rather than relying entirely on its own earthworks, the enclosure uses the natural cliff-edge of Hollywood Glen as two of its walls. The man-made rampart, an earthen bank roughly one metre high and up to seven metres wide, runs in a semicircle from south around to north, terminating at each end where the ground simply drops away. The glen does the rest. It is a practical piece of early medieval engineering, using the landscape as a ready-made defensive feature.

Ringforts, known in Irish as raths when defined primarily by earthen banks rather than stone, were the standard farmstead type in early medieval Ireland, built roughly between the fifth and twelfth centuries. Most are circular; this one is semicircular precisely because the cliff made the other half redundant. The enclosure measures around thirty metres north to south and just over twenty metres east to west. Outside the main bank there is a fosse, a defensive ditch about four to six metres wide and nearly a metre deep, and beyond that a further outer bank. The entrance gap, three metres wide, sits at the northern end between the ramparts and a field boundary that follows the cliff-edge. No internal features are visible at ground level today. What gives the site an added layer of interest is its relationship to the surrounding landscape. A second ringfort occupies a near-identical position on the opposite side of Hollywood Glen, roughly 250 metres to the south-east, suggesting that the two enclosures were deliberately placed to mirror or complement one another across the valley. A standing stone also survives about thirty metres to the north-east, hinting at an earlier or parallel tradition of monument-making in this small corner of County Wicklow.