The Col du Tourmalet is a cycling legend, and it starts the first real cruncher of a stage, with five climbs in more than 200 kms, and a mountain top finish in Spanish Val d’Aran. This is where the favourites will have to show whether they are up to the game or not. Alt 2,115 m. Length 18.4 kms. Gradient 7.7 pct.