The Balsas River is a river in south-central Mexico, and is one that country's largest rivers, forming a large basin called the Balsas Basin. The Murray River in Australia. ...

It rises as the Atoyac River at the confluence of the San Martin and Zahuapan rivers in Puebla state and flows southwestward and then westward through Guerrero state, in which it is the principal river and is locally known as the Mezcala. The Mexican state of Puebla is located in the center of the country, to the east of Mexico City. ... Guerrero is a state in the United Mexican States. ...

It forms the border between Guerrero and Michoacán states and empties into the Pacific Ocean at Mongrove Point, adjacent to the city of Lázaro Cárdenas, Michoacán. Guerrero is a state in the United Mexican States. ... Michoacán de Ocampo (From michoaque, Nahuatl for those who have fish) is one of the 31 constituent states of Mexico. ... Lázaro Cárdenas is a town located in the southern part of the state of Michoacán, it was formerly known as Los Llanitos, but it change its name for the one of Lázaro Cárdenas who was president of Mexico from 1934 to 1940. ...

It is 771 kilometres long.

There are many rapids along its length. The river is used to generate hydroelectric power. It is also a source of water for irrigation.