These ancient structures, recorded on the first and second editions of the Ordnance Survey 6-inch maps as Fort DG053-023001 and an associated cave, have left no visible trace above ground. The site occupied what was already good agricultural land in the 19th century, which has undergone further improvement since Kinahan documented it in 1886, likely contributing to the complete erasure of these archaeological features.

The disappearance of such sites is a common story across Ireland’s agricultural heartlands, where centuries of farming have gradually smoothed away the earthworks that once dotted the countryside. Ringforts, which served as defended farmsteads during the early medieval period, were typically circular enclosures surrounded by earthen banks and ditches. The cave mentioned alongside this particular fort may have been a natural feature incorporated into the settlement, or possibly a souterrain; an artificial underground passage often associated with ringforts and used for storage or refuge.

This lost fort near Ballymacool represents just one entry in the comprehensive Archaeological Survey of County Donegal, compiled in 1983 by Brian Lacey and his team of archaeologists. Their work documented the county’s field antiquities spanning from the Mesolithic period through to the 17th century, capturing details of sites that, like this ringfort, might otherwise be forgotten entirely. While modern farming has claimed this particular piece of Donegal’s ancient past, the written record ensures that its existence, however ephemeral, remains part of the county’s archaeological story.