The site occupies a naturally defensible position, with sheer cliff edges protecting the northwestern half whilst a substantial stone wall, originally 2.2 metres wide, curves along the southeastern boundary. Though much of this wall has collapsed over the centuries, sections of the outer facing still stand up to 1.2 metres high, offering visitors a tangible connection to the fort's original construction.

The defensive wall appears to fade towards the eastern side, where archaeologists have identified what may have been an entrance, roughly 2 metres wide. This would have served as the primary access point to the fort's interior, which today presents an undulating landscape of heather-covered ground. The positioning of this entrance, combined with the natural and constructed defences, suggests careful planning by the fort's builders to maximise both security and accessibility.

Perhaps the most intriguing features are two narrow, straight-sided rock crevices at the northwestern end of the promontory. These natural formations could have been roofed and utilised as souterrains; underground passages that were commonly used in early Irish settlements for storage, refuge, or ritual purposes. Set against the barren, heather-clad landscape that characterises this part of County Donegal, the promontory fort stands as a testament to the ingenuity of ancient communities who transformed this windswept terrain into a formidable stronghold.