This impressive standing stone measures 2.2 metres in height, 1.34 metres across, and nearly half a metre thick; its broad faces oriented north to south. The stone occupies a strategic position on the landscape, with the ground falling away to both the north and east, giving it a commanding presence over the surrounding countryside.

Like many of Ireland's prehistoric monuments, this standing stone remains something of an enigma. These solitary markers dot the Irish landscape and likely served multiple purposes for the communities that erected them, from territorial boundaries to astronomical alignments, or perhaps as memorial stones for significant individuals or events. The Clashygowan stone's substantial dimensions and careful positioning suggest it held considerable importance for those who went to the considerable effort of raising it.

The site was documented as part of the comprehensive Archaeological Survey of County Donegal, conducted by Brian Lacey and his team in 1983. This survey catalogued the county's field antiquities spanning from the Mesolithic Period through to the 17th century, providing invaluable records of monuments like this one that continue to stand as silent witnesses to Ireland's deep prehistory.