Km 37.5 - Col de Tamié 8.5 kilometre-long climb at 6.4% - category 1
Km 60.0 - Col de la Forclaz 8.1 kilometre-long climb at 7.8% - category 1
Km 94.5 - Col de la Croix Fry 11.3 kilometre-long climb at 7% - category 1
Km 103.0 - Col des Aravis 4.3 kilometre-long climb at 5.8% - category 3
Km 145.0 - Côte des Amerands (VC-D909) 2.7 kilometre-long climb at 11.2% - category 1
Km 155.0 - Montée du Bettex 7 kilometre-long climb at 7.7% - category 1
As far as I know, Lacets de Montvernier originally also should have been a 1st category climb. (if you klick on "Mountain passes and hills" on the official website, it is still listed as a 1st category climb)
I thought Nibali looked like he was on a training ride, and had no interest in testing his limit at this point in June. I saw Nibali do this live at the Tour of California a few years ago, and then race great at the TDF 2 months later.
Perault, in contrast, look frazzled and like he cracked.
S. Yates keeps surprising me. He has great shape all the way since PV. I thought he might crack like Alaphilippe, but he is still going strong. I'm interested what he can do tomorrow. He is in contention for the win at this point. Besides him the strongest climbers are TvG, Froome, Bardet and also surprisingly Intxausti, who is still flying on his Giro legs. Rain is forecasted for tomorrow so expect long range attacks and carnage again. The GC is still very open.