The Col de Porte (elevation 1,326 m (4,350 ft)) is a mountain pass situated in the Chartreuse Mountains in the Isère department of France, between Le Sappey-en-Chartreuse to the south and Saint-Pierre-de-Chartreuse to the north.

There is a small ski resort situated near the col.[3] The Col de Porte is regularly used in the Critérium du Dauphiné.

Despite the fall, he won the stage at Bastille in Grenoble ahead of Lucien Van Impe and Bernard Thévenet.

[4][5] From Grenoble, to the south, the climb via the D512 is 17.7 km (11.0 mi) long, gaining 1,116 m (3,661 ft) in altitude, at an average gradient of 6.3%, with the steepest section being at 10%.

2.5 km (1.6 mi) from the summit, it passes the Col de Palaquit (1,154 m (3,786 ft)).