Some of the well-developed routes for mountaineering are: The climb to the Thunderer volcano, which has several trails that reach up to the large glaciers; trails to the Tronador (an extinct volcano); the trails that link the San Martin shelter and Manfredo Segre (Black Lagoon); treks to San Martín and Manfredo Segre (Laguna Negra); to Lopez and to the viewpoint of the Stone of Habsburg, the walk of Paso de las Nubes Puerto Frías linking to Pampa Linda; to the valley and the ridge of Mount Rucaco Black Gap; and to Frey and San Martín (Jakob lagoon), which passes by the edge of Cerro Catedral.