The Swiss area of Alta Rezia - the valley of Poschiavo, St. Moritz, and Monastero valley - features a number of freeride trails for mountain bike.
The trails in this area are an experience that can't be missed: they're surrounded by the Swiss landscape, so much care to keep things and villages clean!
There're so many special and unforgettable opportunities to have fun when riding a MTB: difficulties are a few, but fun is guaranteed.
Travel on the Bernina red train (it's also known as the Bernina Express) from Tirano and you'll get to the Bernina Pass (2328 m asl) - in a quiet and very special way. Up there you'll have choose between two attractive alternatives: you can either reach Tirano on single trails and secondary roads or get to St. Moritz and enjoy the area of Pontresina, Celerina, and Silvaplana.
Another spectacular loop, almost 100% on the Swiss territory is the one crossing the legendary d'Uina valley. The starting point is Santa Maria (in Val Monastero), you cycle along the da Costainas Pass climb (2251 m) and you go down to S-Charl (1810 m als), crossing a very wide and unspoiled valley. The descent ends in Scuol, Bassa Engadina.
Cycle from the bottom of the valley up to Sur En and enter the d'Uina valley. The first climb is on a dirt and very wide road and the slopes are not too difficult. In the higher part of the valley, the path gets incredible and somehow special: to get on top you must cross a path carved into the rock, on a 50m sheer drop. The descent to Slingia is simple, but with sometimes challenging slopes. Once you get near Glorenza, you go back to Switzerland via Monastero valley and return to Santa Maria.
If you choose Livigno as starting point, you can enjoy another loop: you cross Cassana Pass, go down to Bassa Engadina, cross the area to Pontresina, climb via bike trails and single trails until you get to Diavolezza (the ski lift that takes to the Diavolezza glacier). The best way to get back to Livigno is along the very beautiful Fen valley. The final part is very hard, with a very, very steep descent overlooking the road below: it will take you to Passo della Forcola.
A well-known path to get to Italy is from Santa Maria through Val Mora: these areas are part of several transalp tours (tours for bikers from Germany to Lake Garda) to Livigno or Santa Caterina Valfurva.