The Sarthe River is a 313-kilometer long river located in western France. It flows through the regions of Pays de la Loire and Normandy, eventually joining the Loire River near the city of Angers. The river is known for its picturesque landscapes and is a popular destination for recreational activities such as canoeing and fishing. The Sarthe River has several tributaries, including the Loir and Mayenne rivers. It plays an important role in the local ecosystem and supports various wildlife. The river also has historical significance, as it has been a vital waterway for trade and transportation since ancient times.