The Bellanascaddan standing stone rises 1.72 metres from the ground, its weathered surface measuring 1.1 metres across at its widest point and nearly a metre thick. Oriented east to west, this prehistoric monument occupies prime agricultural land on the crest of the ridge, suggesting its placement was quite deliberate.

Standing stones like this one are found throughout Ireland, silent witnesses to prehistoric communities who erected them for reasons that remain largely mysterious. Some may have served as territorial markers or meeting points; others possibly held astronomical significance or formed part of ritual landscapes. The Bellanascaddan stone's prominent position on high ground would have made it visible for considerable distances, perhaps serving as a landmark for ancient travellers navigating the Donegal countryside.

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, providing crucial documentation of Donegal's rich archaeological heritage. The Bellanascaddan standing stone represents just one piece of this vast historical puzzle, a tangible link to the people who shaped this landscape long before written records began.