The Col de la Couillole is a mountain pass in the Massif du Mercantour-Argentera of the French Alps, situated at an altitude of 1,678 m (5,505 ft) in the Alpes-Maritimes department, France.

The road connection is open for six to seven months of the year, allowing travel between the Cians gorges in the west and the Tinée valley in the east.

Couillole is a modified version of cayolle from the Provençal dialect, a word designating a stony ground.

Belgian Lucien Van Impe, wearing the polka dot jersey, crossed the col in the lead.

[4] Sergio Henao, fourth on the stage, took the yellow jersey from Julian Alaphilippe, the latter having been dropped earlier in the climb.