categorised climbs. The ninth stage included the steep climbs of the ColdelaBiche [fr], the Col du Grand Colombier, and, after a 42-year absence, the Signal
per Tour. When the mountains classification in the Tour de France originated in the 1933 Tour de France, there was only one type of mountain. Points were
hills in the Tour de France. Among the passes most often crossed, Col du Tourmalet, Col d'Aubisque, Col d'Aspin, Colde Peyresourde and Col du Galibier predominate
east and commenced the 10.5 km (6.5 mi) ascent of the Hors catégorie ColdelaBiche [fr] at 1,316 m (4,318 ft). The race then descended south through Virieu-le-Petit