- Madre de Dios River
River, southeastern Peru and northwestern Bolivia.It rises in the easternmost range of the Andes Mountains, in Peru, and flows east to the Bolivian border. There it turns northeast and crosses the tropical rainforest of northwestern Bolivia, joining the Beni River after a course of more than 700 mi (1,100 km). A tributary of the Amazon River, it is navigable in its upper course and again below the Peru-Bolivia border.
* * *Spanish Río Madre De Dios,headwater tributary of the Amazon in southeastern Peru and northwestern Bolivia. It flows from the Cordillera de Carabaya, easternmost range of the Andes, in Peru, and meanders generally eastward past Puerto Maldonado to the Bolivian border. There it turns northeastward and crosses the remote tropical rain forest of northwestern Bolivia. It joins the Beni River at Riberalta in Bolivia after a course of more than 700 miles (1,100 km). Numerous tributaries, including the Manu, Colorado Arana, Pariamanu, and Tambopata, flow into the main river, the upper course of which can be navigated by small craft. Below the rapids at Puerto Heath, on the Peru-Bolivia border, the Madre de Dios again becomes an important transportation artery. Rubber is gathered from the dense tropical rain forest along the river's banks. The basin is sparsely settled and in parts of the upper course is uninhabited.
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