Both the first and second editions of the six-inch OS maps carefully documented this defensive structure on what was then a south-facing slope surrounded by good grazing land. Today, visitors to the area would find no trace of these ancient earthworks; extensive quarrying has completely erased what once stood here, leaving only the cartographic record as evidence of its existence.

The fort at Gortcally represents one of countless ringforts that once dotted the Irish landscape, serving as defended farmsteads during the early medieval period. These circular enclosures, typically dating from around 500 to 1200 AD, were home to farming families who built their homes within protective banks and ditches. While thousands of these structures survive across Ireland, many others, like the one at Gortcally, have been lost to agricultural improvement, quarrying, and development over the centuries.

The documentation of this lost fort comes from the comprehensive Archaeological Survey of County Donegal, compiled in 1983 by Brian Lacey and his team of archaeologists. Their meticulous work, which catalogued field antiquities from the Mesolithic period through to the 17th century, ensures that even vanished sites like this one remain part of the historical record. Though the physical fort may be gone, its inclusion in both historic maps and modern archaeological surveys serves as a reminder of how dramatically Ireland’s landscape has changed, and how much of its ancient heritage exists now only in memory and documentation.