Serra de Busa is one of the mountains that form the Pre Catalan, and is located south of the Sierra Bastets at Solsonés.
Due to its large conglomerate cliffs, seems almost inaccessible, but has four access points: two road and walking only two.
Serra de Busa form a broad plateau while a natural island that receives the name of the Plan Busa, carved on all sides for its high cliffs.
Serra de Busa was formed root of the softest materials deposited during the Oligocene Pyrenean rivers, especially the Lord valley, south of Busa, dexeisin totally isolated plateau at an altitude of about Busa 1,300 meters.
The highest part is the Serrat Grills with Cogul at the top of the peak of the Sierra, 1,526 mts.
