Laguna Tromen sits on the northern slope of Volcán Tromen at an elevation of 2,100 meters above sea level, within Parque Provincial El Tromen in the departments of Chos Malal and Pehuenches, Neuquén province, Argentina. The lake covers a surface area of 4.5 square kilometers and has a mean depth of 82 meters, making it a substantial body of water despite its high-altitude setting. The nearest town is Chos Malal, approximately 38 kilometers away, accessed via Ruta Nacional 40.

The laguna is part of the Río Negro drainage basin and holds international recognition as a Ramsar wetland site, reflecting its ecological significance. The surrounding landscape includes a lava field associated with the volcano, adding a distinctive geological character to the setting.

Wildlife is a defining feature of this location. The lake supports a rich diversity of bird species, including grebes, bandurrias, black-necked swans, herons, flamingos, cauquénes, and various ducks. Migratory birds from the Canadian tundra visit here, among them sandpipers and the phalarope. The Andean condor is present in the broader park area. This concentration of birdlife makes the laguna of particular interest to naturalists.

The park, established by provincial decree in 1971, also encompasses the Bañado los Barros wetlands nearby. Activities available within the park include ecotourism and hiking, and the volcano itself can be climbed to explore its craters. The combination of the lava field, wetlands, and high-altitude lake gives the area a varied and geologically active character.

Given the elevation of 2,100 meters, paddlers should account for the effects of altitude and the typically cold, exposed conditions common to Patagonian high-country lakes. The park's Ramsar status may carry specific regulations regarding use of the water body, and paddlers are advised to check with provincial park authorities regarding any restrictions before planning a trip.