At Saint Chaffrey, take the road to the Col du Granon and park in the large car park at the top of the pass.
(S/E) Take the military road (unpaved track) at the exit of the car park. Join the Cibières torrent where a path starts on the left.
(1). Take this path, which quickly disappears, but just keep climbing until you reach theGR®57. Continue left on theGR® (red and white sign and markings). You will quickly reach the Col de l'Oule
(2) Begin the descent to quickly reach Lac de l'Oule, still on theGR®57.
(3) Return to the Col de l'Oule.
(2) Turn right onto the Col des Cibières trail (sign) and follow it.
(4) Continue left on the correct path marked in yellow. Leave the Porte de Cristol and Bergerie paths on your right and take the path on the left, which will take you almost to the hillside at the Col du Granon car park (S/E).