The high altitude trail Kellerbauerweg runs between the two valleys: Selva dei Molini-Mühlwald e Rio Bianco-Weißenbach. The trail connects the Sonnklar hut (2430 m) with the mountain refuge Giovanni Porro/Chemnitzer Hütte (2419 m). The hike is rated intermediate-high for level of difficulty and offers unforgettable moments. The tour requires experience, not to suffer from vertigo, sure-footedness, physical fitness as well as suitable equipment.