The Alagón is a 205 km long river in Spain, right tributary to the Tagus, as well as this river\’s longest tributary. Its source is at 1,060 m in the Sierra de Francia, near the village Frades de la Sierra, south of Salamanca. The Alagón flows southwest, through the towns San Esteban de la Sierra, Guijo de Granadilla, and Coria. It finally joins the Tagus at Alcántara.
