No earthwork, no depression in the ground, no ring of scrub marking where something once stood. The ringfort that existed here has been entirely levelled, leaving behind only its presence in an old map.

When the Ordnance Survey teams passed through in 1842, they recorded it on their six-inch map as a hachured circular enclosure, roughly 33 metres in diameter. That notation, a convention used to indicate a raised or embanked earthwork, is now the sole evidence that anything was ever here. Ringforts, known in Irish as raths or lios depending on local usage, were the most common form of rural settlement in early medieval Ireland, typically consisting of a raised circular area enclosed by one or more earthen banks and ditches. They served as farmsteads for free farming families, and thousands survive across the country in varying states of preservation. The one at Clashmorgan did not survive. At some point between that 1842 survey and the present, it was removed, most likely through agricultural clearance as land was improved and fields were regularised. The process was common across Ireland, particularly through the nineteenth and twentieth centuries, and it accounts for the disappearance of a significant proportion of the ringforts once visible in the landscape.