Forcella di Sopranes
Very long and very challenging itinerary, with the ascent to the fork to be done in portage (although in ebike you can proceed well with the walk), but very scenic and very fun on the descent, provided you have very good riding skills on the technical.
From Merano you climb along the beautiful Passeiertal bike path and then arrive in Plan. From here you ascend on forest and cart track to over 2000 meters, then on the trail partly pedaling and partly pushing, with some portage sections.
From the fork onwards the view is fantastic, with views of the various Sopranes lakes all beautiful and one different from the other, placed on various levels. The descent is challenging from start to finish, with a few sections where you can rest and two huts for refreshment.
Do it on a clear day to take in the views and not wet, because the descent, especially in the lower part, is quite slippery if wet.