The Yanachaga - Chemillen National Park was established on August 29, 1986, through Law (D.S.) N 068-86-AG.

This National Park is situated in the department of Pasco, province Oxampampa, districts of Oxapampa, Villarica, Huancabamba and Pouzo on a chain of mountains to the east of the Andes. It has a surface of 122,000 hectares.

One of its main attractive is the innumerable amount of mosses, brackens, archids, cans, bushes it has. We con also find the ulcumano (Podocarpus rospigliossi and Podocarpus glomeratus), the Diablo fuerte tree (Podocarpus oleifolrus and Podocarpus utilior), cedar (Cedrela lilloi and Cedrela mountain), walnut tree (Juglans neotropica), oak tree (Lauraceas) among others.

There are also palm trees of different types. The wild fauna is represented by 59 species of mammals; for example: the river wolf (Pteronura brasiliensis), the jaguar (Panthera onca), the spectacled bear (Tremarctos ornatus), the small deer (Pudu mephistopliles), the machetero (Dinomys branickii), all of then in danger of extinction. We con also find 427 species of birds, as: aguila harpía -eagle- (Harpya harpija), the Gallito de las rocas (Rupicola peruviana), the relojero (Momotus momota), the quetzal (Pharomachrus sp.) and the tucanetas among others. There are 16 species of reptiles for example: the jergon (Bothrops sp.), the shushupe (Lachesis muta) and the naka naka (Micrurus sp.). In its rivers we count on 31 species of fishes such as corvina (Plagiosion auratus), boquichico (Prochilodus nigricans) and the Lisa (Schizodon fasciatus). About population there are 60 native villages.

There has been found different archaeological sites from the Inca and Yanesha cultures. The purpose of this Park is the conservation of the rivers Palcazú, Huancabamba and Pozuzo in order to keep the continous production of its valleys and the conservation of natural areas to protect the native's communities like yaneshas stabilized in the surroundings of the park.