Lanín National Park (Spanish: Parque Nacional Lanín) is a national park of Argentina, located in the Neuquén Province, with forests of diverse tree varieties, mainly Fagaceae and conifers such as the lenga and the Araucaria, many species of which are not found elsewhere in Argentina.

The park contains the Lanín volcano, and the Huechulafquen, Aluminé, and Lácar lakes among other attractions.

Sport fishing of salmon and trout is practiced in the lakes and the numerous rivers and streams.

The city of San Martín de los Andes on the shore of Lake Lácar serves as hub for tourists visiting the park, as well as to skiers visiting the nearby Chapelco ski centre.

[1] Most of the precipitation is concentrated from May to August while snowfall can fall anytime from May to October.