The interior of the rath, a circular earthwork enclosure of the kind widely built across Ireland during the early medieval period, has been largely quarried away, and in the process something older and more concealed appears to have been disturbed. What survives is a length of drystone masonry roughly a metre long and sixty centimetres high, oriented east to west, with poorly preserved remnant walling extending northward for about three metres from its western end.

The structure is tentatively identified as a souterrain, an underground or semi-underground passage built from stone, typically associated with raths and used for storage, refuge, or both. They are a common feature of early medieval Irish settlement, though most survive in far better condition than this example. Here, the quarrying that hollowed out the rath's interior has left only a section face in which the masonry is visible, making it difficult to determine the original extent or form of the passage. The intersection of the east-west wall with the northward-running remnant suggests a more complex structure once existed, now mostly lost to the quarry workings.