The River Lyon is a river located in the region of Auvergne-Rhône-Alpes in southeastern France. It flows through the picturesque landscapes of the Lyon metropolitan area, eventually joining the Rhône River. The river is approximately 30 kilometers long and is known for its scenic beauty and recreational opportunities. The River Lyon is an important waterway for the local ecosystem and supports various wildlife species. It also plays a role in the region's agriculture, providing irrigation for nearby farms. The river is popular for activities such as fishing, kayaking, and hiking along its banks.