Huallaga

Huallaga river is one of the longest rivers in Peru. It is a tributary of the Amazon Basin's Marañón River. Guallaga and Rio de los Motilones were two old names for this river. The Huallaga flows from the Andes in central Peru and merges with the Marañón before joining the Ucayali River to form the Amazon. The Monzón, Mayo, Biabo, Abiseo, and Tocache rivers are its primary tributaries. Coca is grown in the majority of those valleys, which are also subject to floods on a regular basis. Despite its length of 1,100 kilometers, it is mostly impassable. The Huallaga is a raging torrent that runs through a series of canyons for nearly its entire length. The river includes 42 rapids and forms the Pongo de Aguirre gorge as it enters the Andes. The Huallaga can be ascended by larger riverboats from this point, 140 miles from the Amazon, to the port city of Yurimaguas, Loreto.

The river is frequently divided into two or three portions, despite the lack of fixed limits. The Upper Huallaga is the section of the river that runs from Tocache, San Martin, to the river's source. The river's upper and lower reaches are referred to as the middle and lower Huallaga, respectively. These divisions are for reference only and are unrelated to the Amazon Rainforest's "highland" and "lowland" jungle zones.

Total Length: 671 miles (wholly within Peru)