Parque provincial El Tromen, High-altitude wetland reserve in Neuquén Province, Argentina.

Parque provincial El Tromen covers 30,000 hectares in the departments of Chos Malal and Pehuenches, Neuquén, around the Tromen lagoon and the Tromen volcano. The lagoon lies in a closed basin, and the park spans three biogeographic zones: monte shrub steppe with jarilla and chañar, Patagonian steppe with coirón and grasses, and high Andean steppe.

El Tromen was created on 15 October 1971 by provincial decree no. 1954 of Neuquén. On 2 February 2006, World Wetlands Day, it was declared a Ramsar site, the 1626th in the world and the fifteenth in Argentina. The protected area covers 30,000 hectares spanning the Tromen lagoon and the Tromen volcano.

Ten archaeological sites with remains of objects used by the area's early inhabitants have been identified: five around Laguna de Los Barros, four near Laguna Tromen and one on the slopes of Cerro Wayle. Visitors can look for these spots on the plateau between the lagoon and the volcano.

The park lies in northern Neuquén, between Chos Malal and Buta Ranquil, and is reached by road from either town. The Tromen lagoon sits in a closed basin beside the Tromen volcano, with steppe around both. Bring warm clothing and sun protection for the high-altitude conditions.

The strict endemic Liolaemus punmahuida lizard is known only from this park; its species name combines the Mapuche words for 'foot' and 'mountain'. Ten archaeological sites with objects used by early inhabitants have been recorded, five around Laguna de Los Barros, four near Laguna Tromen and one on the slopes of Cerro Wayle.