What sits on the hummock in Kilcommadan is either the eroded remains of a ringfort or simply a natural landscape feature that has been misread for centuries, and the uncertainty itself is part of what makes it worth knowing about. Ringforts, known in Irish as raths, were the enclosed homesteads of early medieval Ireland, typically circular earthworks surrounding a farmstead and defined by a bank, a ditch, and sometimes a second outer bank. Here, the enclosure measures roughly 24 metres north to south and 16.5 metres east to west, which would place it at the smaller end of the typical range, though that detail comes with the caveat that much of the original structure is gone.

The first edition of the Ordnance Survey six-inch map recorded a curving boundary line in the north-east corner of a field at this location, a detail that suggested something deliberate rather than accidental in the shaping of the ground. What survives today is a partial arc of earthworks, an inner scarp dropping to an intervening fosse, which is essentially a ditch, and then an outer bank beyond it. This arc runs from the south-south-east around through the west to the north-west. Beyond that, the picture deteriorates. Quarrying removed the enclosing elements across the northern arc, from the north-west through north to north-east, and a road running north to south cuts directly through the eastern portion of the monument, leaving nothing visible to its east. The combination of quarrying and road-building has reduced what might once have been a legible circular enclosure to a fragmentary curve, which is precisely why any identification remains provisional.