Le Tour has never been to La Toussuire before, so for information I direct you to some of the weekend warriors who have climbed it:
There are 18 kilometres of climbing from the valley to small Alpine ski resort of La Toussuire. The vertical climb is just over 1,100 metres and will take the riders through the hamlets of Fontcouverte, Villarembert and le Corbier on their way to the ski resort. The climb is never as steep as the Alpe d'Huez with three kilometres over the 18 around nine percent. Most of the climb is between six and seven percent.