The Tambo River is a Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

vian river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 on the eastern slopes of the South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

n Andes

Andes

The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

.

The Tambo is part of the headwaters of the Amazon River

Amazon River

The Amazon of South America is the second longest river in the world and by far the largest by waterflow with an average discharge greater than the next seven largest rivers combined...

 whose origin is the Apúrimac River

Apurímac River

The Apurímac River rises from glacial meltwater of the ridge of Nevado Mismi, a mountain in the Arequipa Province in southern Peru.The Apurímac is the source of the world's largest river system, the Amazon River...

 at Nevado Mismi

Nevado Mismi

Nevado Mismi is a mountain peak of volcanic origin located in the Andes mountain range of Peru. A glacial stream on the Mismi was firmly identified as the most distant source of the Amazon River in 1996; this finding was confirmed in 2001 and again in 2007....

 and which becomes Ene River

Ene River

The Ene River is a Peruvian river on the eastern slopes of the South American Andes.The Río Ene is part of the headwaters of the Amazon River whose origin is at the Nevado Mismi south of Cuzco where it first becomes Apurímac River, then the Ene River and Tambo River before its waters meet the...

 before its waters form the Tambo River. The Tambo River is formed at 11°09′56"S 74°14′07"W at the confluence of the Perené River

Perené River

The Perené River is a Peruvian river on the eastern slopes of the South American Andes.It is formed at at the confluence of the Chanchamayo River and the Paucartambo rivers, 15 km above the community of Perené, at 650 m above sea level....

  and the Ene River

Ene River

The Ene River is a Peruvian river on the eastern slopes of the South American Andes.The Río Ene is part of the headwaters of the Amazon River whose origin is at the Nevado Mismi south of Cuzco where it first becomes Apurímac River, then the Ene River and Tambo River before its waters meet the...

, at the town of Puerto Prado, 400 m above sea level. The river flows 70 km in an easterly direction southeast of Gran Pajonal and then turns north, its total length being 159 km.

At 10°41′57"S 73°45′22"W, the Tambo River joins the Urubamba River

Urubamba River

The Urubamba River is a river in Peru. A partially navigable headwater of the Amazon River, it rises in the Andes to the south-east of Cuzco near the Puno Region border, where it is called the Vilcanota River . In the Sacred Valley, between Písac and Ollantaytambo, it is also called the Wilcamayu...

, at the town of Atalaya

Atalaya, Ucayali

Atalaya is a town in the Ucayali Region of Peru. It is the capital of the Atalaya Province and the Raymondi District. It is located in the jungle of Peru.It is served by the Tnte. Gral. Gerardo Pérez Pinedo Airport....

, 287 m above sea level, and is called the Ucayali River from then on.