The Tour entered the mountains on stage 10. On the program were the two H.C. climbs of Col d'Aubisque and Col du Tourmalet and the 1st category climbs of Col d'Aspin and Col de Peyresourde. Jan Ullrich reclaimed the yellow jersey, but lost 23 seconds to Marco Pantani, who went after eventual stage winner Rodolfo Massi on the last climb and came in second.