It's a very beautiful walk on the CAI trail n° 24.
Go to the Cainallo refuge by car, GET the parking ticket (2 euros for the whole day) and then keep driving on the dirt road until you reach an opening on a meadow. Leave the car here andon the left . The path is , partially inside the wood, showing the . After 1.5 km you'll reach , go right on the sharp rise. On the top, you'll see for the first time , it's really a wonderful panorama!
Keep walking on the trail towardand the , a sort of natural artwork, really impressive. From now on there is a short and then a smooth rise on the hillside, leading to the . The refuge is on a nice opening where you can see . We walked for a total of 4.5 km with a difference in altitude of about 300 meters uphill (one way)
Cainallo refuge website: http://www.cainallo.it (Italian language)
Bietti refuge website: http://www.rifugiobiettibuzzi.it/