The site forms an almost triangular shape, measuring approximately 75 metres from north to south and 85 metres from east to west. What survives today is a stone wall, largely destroyed but still reaching heights of up to 0.75 metres in places, which once enclosed this elevated position. The wall appears to have been constructed on an earthen bank in some sections, though much of the western side has been dismantled, its stones likely repurposed for the field and townland boundary that now crosses through the site.

The enclosure’s eastern wall features two gaps, though whether these are original entrances or later breaches remains unclear. Inside, the ground is covered with heather, typical of these upland areas. The site’s location on high, rough terrain would have provided excellent defensive advantages and panoramic views across the landscape, explaining why this spot was chosen for fortification. Just 70 metres to the east-northeast lies a mound, catalogued as DG011-048, suggesting this area held significance beyond just this single structure.

Known locally as Cashelbane Fort, this hilltop enclosure represents the type of defensive settlement common throughout Ireland’s uplands. While its exact age and original purpose remain subjects for archaeological investigation, such sites typically date from the Iron Age through to the medieval period, serving as fortified homesteads, places of refuge, or territorial markers. The Archaeological Survey of County Donegal, compiled in 1983, provides the most comprehensive documentation of this site, placing it within the broader context of Donegal’s rich archaeological landscape that spans from the Mesolithic period to the 17th century.