The tour starts from the Bernina pass. To get there from Tirano it is very nice to use the Bernina red train, which goes up to an altitude of 2300m on the Bernina pass.
The descent is on very scenic paths and single trails. Even if starting from the highest point, the track is a continuous up and down and at the end the difference in altitude is remarkable.The variety in the track is a factor to be appreciated, combined with the cleanliness of the Swiss trails: you are faced with stretches of asphalt, dirt roads, simple paths and very technical single trails.
Very fun and panoramic.