The Adour is a river located in southwestern France. It flows approximately 324 kilometers (202 miles) from the Pyrenees mountains to the Atlantic Ocean, where it empties near the city of Bayonne. The river is an important waterway for the region, providing irrigation and supporting local ecosystems. The Adour basin is known for its diverse landscapes, including valleys, forests, and agricultural land. The river is also significant for recreational activities such as fishing and boating. Its tributaries contribute to the overall hydrology of the area, making it a vital resource for both nature and local communities.