1860 meters above sea level. A grueling mountain stage in the Tour De France. Andy Hampsten is the only American to win here, back in 1994. Greg Lemond came close in '89, he took second place next to Bernard Hinault, by inches. With 21 switchbacks, all counting down from the bottom, it is the most prestigious stage in Le Tour.

UPDATE Lance Armstrong became the second American to win this climb in the 2001 Tour De France. Stage 10 : Aix Les Bains - l'Alpe d'Huez.