A circular enclosure, roughly 24.5 metres in diameter, was recorded on the third edition of the Ordnance Survey six-inch map in 1931, suggesting that cartographers of that era could still make out something worth marking. Today, no visible surface trace survives, only a low natural mound that offers no obvious clue as to what once stood, or was bounded, here.

Circular enclosures of this kind are a broad category in Irish archaeology, encompassing everything from early medieval ringforts, which were enclosed farmsteads typically defined by an earthen bank and ditch, to prehistoric settlements and burial monuments. Without excavation it is rarely possible to say which type a given example represents. What can be said about Gortaganny is that within the space of a few decades between the 1931 mapping and the late twentieth century, whatever earthwork remained had effectively disappeared into the agricultural landscape around it, leaving only that ambiguous mound as a faint sign that something was once deliberately shaped here. Its proximity to Moylough Castle places it in a landscape with a longer documented history, though the relationship between the two sites, if any existed, is unknown.