The Bidasoa River is a river located in the Basque Country, flowing through northern Spain and southern France. It originates in the Pyrenees mountains and travels approximately 45 kilometers before emptying into the Bay of Biscay. The river serves as a natural border between Spain and France for part of its course. The Bidasoa River is known for its scenic beauty and rich biodiversity. It supports various ecosystems and is home to several fish species, making it a popular spot for fishing and outdoor activities. The river also plays a significant role in the local economy and culture, influencing nearby towns like Hondarribia and Irun.