Río Ucayali

Le' Río Ucayali' is born in the area from Ucayali, with the Peru, of the junction of the rivers Río Tambo and Río Urubamba, in the North-East of the Andes. It runs soft inclined towards the North-West of the country and ends up joining the Río Marañón, thus giving two sources to the the Amazon.

It is more than 2.670 kilometers length, before joining the Marañón, of which 1.500 are navigable for ships of three thousand tons.

The river is born from a glacier of a mountain, the Nevado Mismi, in the the Peruvian Andes , to 650 km in the south-east of Lima and to 160 km in the west of the lake Titicaca. The very young river runs out and becomes soon the Apurímac. Apurímac is thus the upper part of the course of Ucayali, which joint with the Marañón to form the portion of the large river which bears the name of the Amazon from there.

The course of Río Ucayali, together with the Río Apurímac, the Río Ene, and the Río Tambo, is regarded today as the primary source of the the Amazon, adding up a 2.670 km length since the source of Apurimac to its confluence with the Río Marañón:

Río Apurímac (length): 731 km
Río Ene (length): 181 km
Río Tambo (length): 158 km
Río Ucayali (called thus since Río Tambo to its confluence with the Marañón): 1.600 km

The most important affluents of Ucayali are the Río Urubamba, Río Cohenga, Río Tahuania, Río Sheshea, Río Tamaya, Río Tapiche, Río Pachitea and Río Aguaytía.

Its main ports are in the towns of Pucallpa, Contamana and Requena.

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