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|- location||La Paz Department, Bolivia|
|- location||near Riberalta, Bolivia–Brazil border|
|Length||1,100 km (684 mi) |
Map of the Amazon Basin with the Beni River highlighted
It rises north of La Paz and flows northeast. The Madre de Dios River is its most important tributary. Two of Beni's tributaries are the Madidi River and the Tuichi River in the Madidi National Park and Madidi National Park respectively. Tuichi River joins the Beni River upstream from the town Rurrenabaque. South of Rurrenabaque, the Beni River runs through the Amazon rainforest. About 30 km (19 mi) before joining the Mamoré River at the Bolivia-Brazil border, the rapids of Cachuela Esperanza interrupt the upstream navigability of the river.
- Ziesler, R.; Ardizzone, G.D. (1979). "Amazon River System". The Inland waters of Latin America. Food and Agriculture Organization of the United Nations. ISBN 92-5-000780-9. Archived from the original on 8 November 2014.
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