In stage 10, the Tour entered the mountains. The stage, which finished at Hautacam, was won by Spaniard Javier Otxoa, but Lance Armstrong finished second and took the yellow jersey, with Ullrich in second place, more than 4 minutes behind. The 12th stage, finishing on Mont Ventoux, was won by Marco Pantani, but Lance Armstrong finished second with the same time, so Armstrong increased his lead. Stage 15 was also won by Pantani, but again Armstrong gained time on second-place Ullrich, who was 7:26 behind. On the 16th stage, Armstrong had a bad day and lost time. Ullrich's gap shrunk to 5:37.