Dunbulcaun Bay is a picturesque and historically rich estuary located at the head of Galway Bay in County Galway, Ireland. The village of Clarinbridge lies at its head, where the fast-flowing River Clarin empties into the bay. This area is part of the Clarinbridge/Kinvara Bay Shellfish Waters, a designation highlighting its importance for oyster, mussel, and shellfish production. The bay's waters are crystal-clear and invigorating, fed by the Atlantic through Galway Bay. The surrounding landscape features historic sites like Dunbulcaun ringfort and Kilcolgan Castle, with extensive saltmarsh habitats documented along its shores.