Abuna River

The Abuna River is a river in South America. As a part of the Amazon Basin, it forms part of the border between northern Bolivia and north-western Brazil.
The river has a total length of. It originates in several streams east of the Cordillera [Oriental, Peru|Cordillera Oriental] of the Peruvian Andes. The river is navigable for circa in its lower northeastern part. At Manoa it joins the Río Madeira, a tributary of the Amazon. Opposite the river mouth is the town of Abunã on the Brazilian side of the confluence.