This impressive monolith rises just over two metres high, roughly a metre wide and about a third of a metre thick, oriented northwest to southeast. What makes this particular standing stone remarkable isn't just its size or endurance through the ages, but the mysterious markings carved into its southwestern face; at least fifteen cup marks, small circular depressions that were deliberately pecked into the stone's surface thousands of years ago.

Cup marks like these are found on prehistoric monuments across Ireland, Scotland and other parts of Atlantic Europe, typically dating from the Neolithic to the Bronze Age periods. Their purpose remains one of archaeology's enduring mysteries; they might have held ritual significance, marked territorial boundaries, or served astronomical purposes. The concentration of fifteen or more cup marks on a single face of this stone suggests it held particular importance for the people who created them, though their exact meaning is lost to time.

The stone's location in a level meadow is typical of many Irish standing stones, which were often erected in prominent yet accessible positions in the landscape. These monuments served as focal points for prehistoric communities, possibly marking burial sites, assembly places, or astronomical alignments. This particular example was documented in the Archaeological Survey of County Donegal in 1983, part of a comprehensive effort to catalogue and preserve knowledge of the county's rich archaeological heritage from the Mesolithic period through to the 17th century.