This circular stone enclosure, measuring 18.5 metres across its interior, has suffered considerable damage over the centuries, with its enclosing wall now standing just 25 centimetres high in places. The structure sits on a south-facing slope, offering views across the surrounding landscape that would have been strategically valuable to its original inhabitants.

The site appears to have been subjected to later agricultural activity, with field clearance stones piled atop the original structure, obscuring much of its original form. This practice was common throughout rural Ireland, where ancient monuments were often viewed as convenient repositories for stones cleared from neighbouring fields rather than as historical artefacts worthy of preservation. Despite this damage, the basic footprint of the cashel remains discernible to the trained eye.

Cashels like this one were typical defensive homesteads in early medieval Ireland, constructed with dry-stone walls that provided protection for families and their livestock. The Curraghomongan example was first formally documented in the Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983, which catalogued field antiquities from the Mesolithic period through to the 17th century. Though time and agricultural reuse have taken their toll, the site remains an evocative reminder of the farming communities who once called this corner of Donegal home.