Known as the Crislaghkeel standing stone, this ancient monolith measures 1.93 metres tall, 1.24 metres wide, and roughly 0.55 metres thick, oriented along a northeast to southwest axis. Its weathered surface bears witness to centuries, possibly millennia, of exposure to the Atlantic elements that sweep across this corner of Ireland.

The stone forms part of Donegal's rich archaeological landscape, which spans from the Mesolithic period through to the 17th century. Standing stones like this one are found throughout Ireland and typically date from the Bronze Age, though their exact purpose remains a matter of scholarly debate. Some may have served as territorial markers or commemorative monuments, whilst others might have had astronomical significance or formed part of prehistoric ritual practices.

This particular stone was documented as part of the Archaeological Survey of County Donegal, a comprehensive field study compiled by Brian Lacey and his team in 1983. The survey catalogued the county's field antiquities in detail, creating an invaluable record of these ancient monuments. Today, the Crislaghkeel stone continues to stand in its pasture setting, a tangible link to the prehistoric communities who once inhabited this river valley and left their mark on the landscape in the form of this enduring monument.