Los Alerces National Park is located in the Andes in Chubut Province in the Patagonian region of Argentina. Its western boundary coincides with the Chilean border. Successive glaciations have molded the landscape in the region creating spectacular features such as moraines, glacial cirques and clear-water lakes. The vegetation is dominated by dense temperate forests, which give way to alpine meadows higher up under the rocky Andean peaks. A highly distinctive and emblematic feature is its alerce forest; the globally threatened alerce tree is the second longest living tree species in the world. The alerce forests in the park are in an excellent state of conservation. The property is vital for the protection of some of the last portions of continuous Patagonian Forest in an almost pristine state and is the habitat for a number of endemic and threatened species of flora and fauna.

Chubut is a province in southern Argentina, situated between the 42nd parallel south, the 46th parallel south, the Andes range to the west, and the Atlantic Ocean to the east. The province's name derives from the Tehuelche word chupat, meaning "transparent". their description of the Chubut River.