It survives in the record, but not in the landscape; stand anywhere near its supposed location and you will find nothing at ground level to indicate that anything ever stood there.

A ringfort, or rath, is a circular enclosure defined by one or more earthen banks and ditches, typically dating to the early medieval period in Ireland and used as a farmstead or defended homestead. The one at Derrygowna was still visible, and apparently well-defined, when the Ordnance Survey produced its six-inch map series in 1837. That edition shows it as a tree-lined circular enclosure, the kind of feature that would have been a quiet but legible presence in the fields. Trees often grew along the banks of such enclosures, whether planted deliberately or simply left to seed undisturbed across generations of farming. By the time anyone looked again with a systematic eye, that presence had gone. The earthworks had been levelled, the trees removed, and the pasture had closed over whatever once defined the site. What the nineteenth-century mapmakers recorded with enough confidence to ink onto their survey no longer leaves any impression on the surface.