The Saint Cast marina, also known as Port de Plaisance Saint Cast, is a marina located in the town of Saint Cast le Guildo, on the northern coast of Brittany, France. The marina is situated on the Arguenon River, which flows into the English Channel. Saint Cast le Guildo is a popular destination for tourists and boaters, thanks to its beautiful beaches, hiking trails, and water sports activities. The town is also known for its picturesque architecture and historic monuments, such as the Castle of Gilles de Bretagne and the Chapel of Notre Dame de la Garde. The marina is conveniently located within walking distance of the town centre, making it a convenient base for exploring the area.