These simple circular depressions, carved into the stone face, were documented by researcher Van Hoek in 1988, who noted their position east of a feature known as DON 3B, perched at a slightly elevated level and situated south of an old wall structure.

Cup marks like these represent one of Ireland's most enigmatic forms of prehistoric art, typically dating from the Neolithic to the Bronze Age period. Whilst their exact purpose remains a mystery, these deliberately carved hollows appear across the Irish landscape, often in places with commanding views or near other archaeological features. The examples at Carrowreagh form part of a broader tradition of rock art that spans the Atlantic coastline of Europe, with similar markings found from Scotland to Iberia.

The location's dual placename, Carrowreagh or Craignacally, reflects the complex linguistic heritage of Donegal, where Irish and anglicised forms often exist side by side. This particular site, compiled into archaeological records by Caimin O'Brien in 2010, adds another piece to the puzzle of prehistoric Ireland; a landscape where our ancestors left their mark in stone, creating enduring monuments whose meanings we can only guess at today.