And there it is: the only climb in this Giro that deserves the label
salita fuori categoria. The Colle delle Finestre is a beast, not just because it has an unpaved part, but because it's long, high and constantly steep. This mountain pass in the Cottian Alps can be seen as the third toughest climb in Italy, just behind the Zoncolan and the steep side of the Mortirolo. A top climber can take two minutes here on a regular grinder.
The isolated road with hairpins leads to a height with a splendid view. Along the climb stands the Forte delle Finestre, a fortification that was built in 1891 to defend the borders of unified Italy. It had two big cannons, but they were removed during WWI. Whoever wants to win today will need a lot of firepower too.