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The information center usually attends from 08:00 to 20:00. The registry for trails and ascents is mandatory and, in summer, usually takes place between 08:00 and 14:00 (many trails close entry after 14:00 for security).
The park is famous for being the main refuge of the Araucaria (Pehuén) in Argentina.
Forests: Toward the east predominates the steppe, but toward the mountain range it becomes dense forest of Lenga, Ñire, Coigüe, and Pellín Oak.
Valdivian Jungle: In zones like Hua Hum, the humidity allows the growth of colihue cane and trees of great size.
Mammals: One can sight Pumas, Colored Foxes, Huemuls (in very remote zones), and the Monito del Monte. The red deer and the wild boar are very common introduced species.
Birds: The Andean Condor overflies the summits. In the forests inhabits the Giant Black Woodpecker and the Chucao.
