It is gone now, quarried away at some point, leaving only local memory and a note in the record. That small absence is, in its way, as telling as anything that survives.

The fort itself remains. Roughly circular in plan, it measures about 31 metres north to south and just under 30 metres east to west, with a bank that still stands 1.5 metres high on its outer face. That bank narrows to around a metre in width and drops about 75 centimetres on the interior side, giving the enclosed space a slightly raised, bowl-like quality. A rath, to use the Irish term, is the commonest type of early medieval settlement monument in Ireland, a raised earthen enclosure that would once have contained a farmstead or small household. This example sits in Ballymacprior on the Iveragh Peninsula in County Kerry, 235 metres east of a neighbouring monument, and faces the world through a northeast-facing entrance gap just over four metres wide. The name Cúm Beag translates loosely from Irish as "small hollow" or "small valley", which suits the modest, unassuming character of the place. The Iveragh Peninsula, best known today for the Ring of Kerry road, preserves a remarkable density of such monuments, catalogued by archaeologists Aidan O'Sullivan and Jerry Sheehan in their 1996 survey of the region for Cork University Press.