Barranco Sarratanas is a tributary of Fornocal Canyon located in Sierra de Guara, Aragon province of Spain. This barranco as many canyon of the area is eroded through conglomerate material. It offers several section called estrecho where the technique of the down climbing can be used during the descent of the canyon with moderation. Lengh of the canyon is 500 meters and requires a rope of 40 meters.