Measuring 1.7 metres tall and 0.9 metres wide, this ancient monolith stands aligned east to west along what is now a field boundary. The stone doesn't stand entirely alone; three companion stones lie nearby, two set on edge and one lying flat, though their original purpose and relationship to the main stone remain a mystery to archaeologists.

The standing stone at Carrowmore represents one of countless prehistoric monuments scattered across the Donegal landscape, silent witnesses to the beliefs and practices of Ireland's ancient inhabitants. While we may never fully understand why our ancestors erected these stones, whether for ritual purposes, territorial markers, or astronomical observations, their presence continues to intrigue visitors and researchers alike. The positioning of the additional stones suggests this may have once been a more complex monument, perhaps partially dismantled or reconfigured over the centuries as the land was adapted for agricultural use.

This particular stone was documented as part of the comprehensive Archaeological Survey of County Donegal, conducted in 1983 by Brian Lacey and his team of archaeologists. Their work catalogued field antiquities spanning from the Mesolithic Period through to the 17th century, creating an invaluable record of the county's rich archaeological heritage. The survey ensures that even modest monuments like this standing stone, which might otherwise be overlooked in their rural settings, are properly recorded and protected for future generations to study and appreciate.