A lead group of seventeen riders established a three-minute lead over the peloton, before the category 1 Col du Soulor to . Tim Wellens, Vincenzo Nibali and Élie Gesbert led up the climb, with Wellens leading over the summit. On the approach to the hors catégorie Col du Tourmalet, Romain Sicard was at the head of the race, 30 seconds in front of Gesbert and Lilian Calmejane. Gesbert caught and dropped Sicard with to climb, with Gesbert himself being caught by the lead group of general classification contenders at before the finish. With remaining, Geraint Thomas got detached from the lead group containing Alaphilippe, Buchmann, Pinot, Bernal, Landa and Kruijswijk. Thibaut Pinot attacked in the final and held his lead to the finish, at an altitude of , for the Souvenir Jacques Goddet.