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

This National Park is placed in the department of Pasco, province of Oxampampa, districts of Oxapampa, Villarica, Huancabamba and Pozuzo on a mountains range to the east of the Andes. It has an area of 122,000 has.

One of its main attractions is the countless amounts of mosses, brackens, orchids, cans, bushes it has. We con also find the ulcumano (Podocarpus rospigliossi and Podocarpus glomeratus), the diablo fuerte (strong devil) tree (Podocarpus oleifolrus and Podocarpus utilior), cedar (Cedrela lilloi and Cedrela mountain), walnut tree (Juglans neotropica), oak tree (Lauraceas) among others.

There are also many different palm trees. The wild fauna counts 59 species of mammals; 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 them are in danger of extinction. We con also find 427 species of birds, of which the most easily seen are: aguila harpa -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, and these are the most numerous: the fer de lance (Bothrops sp.), the bushmaster (Lachesis muta) and the coral snake (Micrurus sp.). From its rivers we can obtain 31 species of fishes such as corvina (Plagiosion auratus), boquichico (Prochilodus nigricans) and the Lisa (Schizodon fasciatus).
In the area of the park there are also 60 villages inhabited by natives that have been taking good care of nature for hundreds of years. Archaeological sites from the Inca and Yanesha cultures have been discovered in the area.

The purpose of this Park is the conservation of the rivers Palcaz, Huancabamba and Pozuzo in order to maintain the production of its valleys and the conservation of the natural areas to protect the native's communities like yaneshas that are settled in the environment of the park.