Measuring 1.28 metres tall, 1.25 metres wide and 0.4 metres thick, this ancient monolith stands aligned along a west-northwest to east-southeast axis. The stone occupies a slight rise in what is now arable land, its weathered surface bearing silent witness to thousands of years of Irish history.

Standing stones like this one are amongst Ireland's most enigmatic prehistoric monuments. While their exact purpose remains debated by archaeologists, they likely served multiple functions for Bronze Age communities; some may have marked territorial boundaries, others might have been memorial stones, and many appear to have astronomical alignments suggesting they played a role in tracking seasonal changes. The orientation of this particular stone, running roughly east to west, hints at a possible connection to solar observations, though without excavation or further study, its specific purpose remains a mystery.

The stone was documented as part of the comprehensive Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983. This survey catalogued field antiquities spanning from the Mesolithic period through to the 17th century, creating an invaluable record of Donegal's archaeological heritage. Today, the Cúl An Doire standing stone continues its quiet vigil over the countryside, a tangible link to the prehistoric communities who first shaped this landscape.