Known locally as Rinnanane, this coastal promontory features a low earth and stone bank that runs north to south for approximately 90 metres, effectively cutting off the headland from the mainland. Standing just 40 centimetres high and about one and a half metres wide, this modest barrier creates what archaeologists suspect might be a promontory fort, though its exact purpose remains somewhat mysterious.

The bank shows no evidence of any gap or entrance feature, which raises questions about its original function. Whilst its position suggests defensive possibilities, the structure’s small size and simple construction point towards a more recent origin, possibly dating to the 18th or 19th century when it may have served as a field boundary rather than a fortification. This later dating would make it considerably younger than many of Ireland’s prehistoric promontory forts, which typically date from the Iron Age.

Adding to the site’s archaeological interest, an enclosure or cashel sits just 50 metres to the northwest, hinting at a longer history of human activity in this windswept corner of Donegal. The relationship between these two features remains unclear, but together they offer a glimpse into how successive generations have shaped and reshaped this dramatic coastal landscape, from possible ancient defences to more prosaic agricultural boundaries.