From Italy, the climb starts at Vinadio and is 21.5 km long. Over this distance, the climb is 1447 m. (an average percentage of 6.9%), with the steepest sections at 9.1% (although some bends reach over 14%). From France, the climb starts at Isola and is 21.2 km long. Over this distance, the climb is 1477 m. (an average percentage of 7%), with the steepest sections at 9.3% at the foot of the climb.
