This ancient standing stone, measuring 2.27 metres in height with a base width of 65 centimetres and thickness of 35 centimetres, rises from the poor pasture land that characterises much of this rugged terrain. Oriented along an east-west axis, the stone's deliberate placement suggests it held significance for the prehistoric communities who erected it.

Standing stones like the one at Carnamoyle are amongst Ireland's most enigmatic archaeological features, with their original purposes still debated by scholars. Some may have served as territorial markers or waypoints along ancient routes through the landscape, whilst others possibly held ritual or astronomical significance. The east-west alignment of this particular stone could indicate a connection to solar observations, as many prehistoric monuments in Ireland show careful attention to the movement of celestial bodies, particularly during solstices and equinoxes.

The documentation of this monument forms part of the comprehensive Archaeological Survey of County Donegal, compiled in 1983 by Brian Lacey and his team of archaeologists. This survey represents one of the most thorough catalogues of Donegal's archaeological heritage, recording everything from Mesolithic sites to 17th-century structures. The Carnamoyle standing stone, whilst appearing simple in form, represents thousands of years of human presence in this corner of Ireland; a silent testament to communities whose names and stories have long since faded from memory.