Bermejo

Bermejo is a South American river that runs from Bolivia to Argentina's Paraguay River. Despite its various names along the route, the river is commonly referred to as Bermejo, but it also has its own Native American names: Teuco in Wich and Ypitá in Guaran. The Bermejo forms marshes and separates into two branches in Argentina's Gran Chaco plains. The southern offshoot is the former Bermejo River bed, which is now a seasonal torrent known as Ro Bermejito. The Teuco River, Bermejo Nuevo, or simply the Bermejo River, is the northern offshoot of the Bermejo River, which is currently the main stream.

The river originates in the Sierra de Santa Victoria mountain range near Tarija, Bolivia, a few kilometers southeast of Chaguaya and not far from La Quiaca, Jujuy Province, Argentina. It keeps a southern orientation in general. The Lipeo River is its principal tributary at its highest point, and the Grande de Tarija, the Iruya River, and the San Francisco River are further downstream. It is a component of Argentina's and Bolivia's international border.

Length: 659 miles