Forcella Grubl (Grüblscharte) da Dobbiaco
The Grübl Fork, (Grüblscharte), is a spectacular pass at 2,400 meters that connects the Casies Valley with the Antholz Valley.
Although the valley to get there is steep and wild, the two main valleys are excellently connected by an old military trail, still perfectly maintained.
I had already done this route a few years ago by mtb, and in the comments I had written: with the regular bike there are about 250 meters of elevation gain by pushing, while I think by ebike you can pedal all the way to the top.
And indeed it is, with good technique in e-bike you can pedal all the way to the fork. As soon as we reach the top, here is the surprise, beautiful! Suddenly the spectacular Vedrette di Ries appear right in front.
The descent then is just as beautiful, still on a military trail, with about 150 comfortable hairpin bends, you descend 1200 meters to Anterselva. Tough, wild and spectacular tour, starting from Toblach it is about 60 km and 1900+.