Huallaga River

Huallaga River

[wuh-yah-guh; Sp. wah-yah-gah]

The Huallaga River is a tributary of the Marañón River, part of the Amazon Basin. Old names for this river include Guallaga and Rio de los Motilones. The Huallaga is born on the slopes of the Andes in central Peru, and joins the Marañón before the latter reaches the Ucayali River to form the Amazon. Its main affluents are the Monzón, Mayo, Biabo, Abiseo and Tocache rivers. Coca is grown in most of those valleys, which are also exposed to periodic floods.

For nearly its entire length the Huallaga is an impetuous torrent running through a succession of gorges. It has forty-two rapids, and it crosses the Andes, forming the Pongo de Aguirre gorge. From this point, from the Amazon, the Huallaga can be ascended by larger river boats (lanchas) to the port city of Yurimaguas, Loreto.

The Huallaga is divided in two, before and after it passes the city of Juanjuí: the Alto Huallaga (Upper Huallaga) and the Bajo Huallaga (Lower Huallaga), because the terrain changes from the slopes of the Andes to the swamps of the Amazon Rainforest. Between the Huallaga and the Ucayali lies the famous "Pampa del Sacramento," a level region of stoneless alluvial lands covered with thick, dark forests, first entered by Christian missionaries in 1726. It is about long, from north to south, and varies in width from 40 to 100 metres. Many streams, navigable for canoes, penetrate this region from the Ucayali and the Huallaga. In addition to peasants, it is still occupied by many indigenous communities, such as the Cocama-Cocamilla.

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