El Pallars Sobirà is one of the regions with a bigger number of protected areas. Actually, the only National Park in Catalonia is here, a part from the Natural Park of the High Pyrenees, certain parts of the PEIN (Pla d'Espais d'Interès Natural de Catalunya- Natural Interest Landscape Plan of Catalonia) and the National Hunting Reserve of Boumort. It also has the biggest lake in the Pyrenees, Certescan, and the highest peak of the princedom: the Pica d'Estats.