The Aguán River ; also commonly known by its Spanish name, Rio Aguán) is a river in Honduras. It rises in the Yoro region to the west of San Lorenzo and briefly runs south before turning east-northeast, passing San Lorenzo, Olanchito and Tocoa before entering the Caribbean Sea east of Puerto Castilla. The river is 240 km long. In 1998 Hurricane Mitch caused to the river to burst its banks at several points along its length. The maximal discharge at Sabá was estimated at almost 20000 m3/s. The village of Santa Rosa de Aguán was washed away by the river, causing dozens of deaths. The Aguán River's watershed is one of seven watersheds in Honduras, and covers over 1 e6ha, of which around 200,000 are in the Aguán River Valley. The Aguán River Valley includes the major agricultural area of Bajo Aguán.