What survives is roughly subcircular in shape, measuring about 29.5 metres across, and the ground tilts away to the south-east as the drumlin, one of those smooth glacially deposited hills that stud the Ulster countryside, falls off beneath it. The earthwork is still legible, though only just: on the north-western side the bank stands to a reasonable height, about 1.3 metres on the interior and 1.2 metres on the exterior, and extends to around 3 metres in width. Elsewhere the bank has been reduced to a scarp, dropping some 1.45 metres on the south-eastern arc, with hedgerow filling the gaps where the original earthen perimeter has worn away or been disturbed.

This kind of enclosure is generally understood to be a ringfort, the most common early medieval monument type in Ireland. Ringforts, also called raths, were typically the enclosed farmsteads of farming families between roughly the fifth and twelfth centuries, their earthen banks and ditches defining a domestic space rather than a purely military one. At Drumbenagh, traces of an outer fosse, a defensive ditch running around the outside of the bank, suggest the enclosure may once have been more substantial than it now appears, with a second line of boundary marking out the perimeter. The original entrance has not been identified, which means something about how the place was approached and used in its active life remains genuinely unresolved.