Cycling the Fedaia
The Fedaia is considered one of the hardest climbs in the Dolomites, as well as most unique. It features a box-canyon portion and summit lake. The overall views are not as good as some other climbs around here, but the canyon and lake are worth the visit.
Out of Arabba, you go about 10k to SS563, taking a hard right downhill. This descent is mostly car-free and very twisty.
SS653 is a quiet road but has a dark tunnel. Bring a rear light for safety.

Expect tunnels around here so make sure you have a rear light on your bike. Or else.
Eventually, you come to a crossroad. Left for the Giau and right for the Fedaia. Today we go right first.

Flowers and a fetching view at the start of Passo Fedaia

Heading toward Fedaia and saw this.Not sure what to call it.
Enter the box-canyon portion, the Serrai di Sottoguda. This portion of the Passo Fedaia climb can be taken only on foot or bicycle. They charge you 2-euro for the experience. It’s the best 2-euro you will spend.

The Serrai di Sottoguda from above.

Fellow riders in the Serrai di Sottoguda, which is a slot canyon that can be used as part of the Fedaia climb. It’s spectacular.
Once past the Serrai di Sottoguda section, the views gradually open up and you climb out of the trees.

The great views going up the Passo Fedaia help take your mind off the pains in your legs.
This road has a couple sections of 15-percent.

Both going up and down the Fedaia, the road is steep.
The top of the Passo Fedaia, with the requisite stickered sign, and a mountain lake just beyond it.