Before crossing the Italian-French the riders climb to Sestriere. It’s a 7 kilometres toil with an average gradient of 7.2%, but if you start your mathematics at the start the ascent is 39.9 kilometres long and sloping at 3.7%.
The Tour descends into France and continues north towards to the Col de Montgenèvre. This 8.3 kilometres climb at 5.9% is crested around the midway marker. Following a reltively short descent the riders a false flat towards the Col du Galibier. Which is a beast – 23 kilometres long and averaging 5.1%. The last kilometre goes up at 9% before a 19 kilometres descent leads to the line in Valloire.
Valloire saw only one Tour de France stage finish until now. In 2019, Nairo Quintana soloed to victory from the breakaway in the village that’s nestled between the Col du Télégraphe and Col du Galibier. The 2019 stage also came down the latter pass.
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