The head of the Vall Fosca is part of the Aigüestortes and Estany de Sant Maurici National Park, specifically its peripheral protection area. Access in the Park can be done with the Vall Fosca Cable Car, the only one existing on the southern side of the Pyrenees. Located in four counties, in the heart of the Pyrenees, the National Park protects a high mountain landscape where water is the protagonist, since it has almost 200 lakes and a multitude of streams. In the Vall Fosca in particular, there are more than 30 lakes of glacial origin, located above the 2200 meters of altitude. Its environment is the habitat of emblematic animals such as the chamois or the white partridge.

The Aigüestortes and Estany de Sant Maurici National Park is the only national park in Catalonia. It is located mostly above 1,500 meters of altitude. Therefore, its predominant landscape is that of high mountain, with a great wealth of fauna and vegetation, and an abrupt change, with glacial circuses, lakes and gorges that are the legacy of the erosive action of the Quaternary glaciers. The water, with almost 200 lakes and countless streams, is the protagonist of the National Park of Aigüestortes and Estany de Sant Maurici.

In addition to its natural charm, in this area you can make several itineraries on foot. These routes connect the lakes which are over 2000 m. The long-distance road GR-11-20, which allows you to reach Espot and Boí, passing through the Vall Fosca, the Carrilet Greenway, ascents to peaks such as the Peguera (2,983 m) or the Montsent de Pallars (2,883), among others, or the return through the shelters of the National Park, Carros de Foc, which in the Vall Fosca begins in the refuge of Colomina.