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 .
1-522: There are three dams across its course: the "Gabriel y Galán", the largest one, generating 110 MW of electricity; the "El Pontón", at Guijo de Granadilla , generating 52 MW of electricity; and the "Montehermoso-Valdeobispo" dam. Francia River , Sangusín River , Cuerpo de Hombre River , La Palla River , Río de los Ángeles , Ambroz River , Jerte River , and Árrago River . 40°40′51″N 5°47′09″W / 40.68083°N 5.78583°W / 40.68083; -5.78583 This article about
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