What was once a circular earthwork enclosure, the kind of defended farmstead that thousands of early medieval Irish families called home, now survives only as a faint trace absorbed into the surrounding pasture, and possibly as a small remnant of bank folded into a field boundary to the north.

A ringfort, or rath, is typically a roughly circular area enclosed by one or more earthen banks and ditches, used as a farmstead from roughly the fifth to the twelfth century. This one at Killeen was still legible enough to be recorded on the Ordnance Survey six-inch map of 1842, where it appears as a circular enclosure. At some point after that survey, the banks were levelled, most likely when field fences were being cleared or rearranged, a process that destroyed countless such monuments across Ireland throughout the nineteenth and twentieth centuries. The natural steep scarp running along the southern and eastern edges of the site may mark where the enclosure ended, the landscape itself doing what the earthworks no longer can.

There is little for a visitor to see in any conventional sense. The south-facing slope and its view across Dunmanus Bay remain, and the field boundaries to the north are worth a careful look, but the monument itself has been absorbed back into the land that once supported it.