Climb up through Die and pass Chamaloc. When you reach the entrance to the Col du Rousset tunnel, park in one of the two car parks.
(S/E) Go back down the road a few metres and take the path on the right, continue until you reach the mule track and admire the work of the "ancients" who dug this path by hand overlooking the valley, a dizzying sight.
After this path, you enter the forest and arrive at the Bergerie de Chironne, then at the Col de Chironne.
(1) Take the path on the left that climbs steeply up the grassy slope and arrives at the ridge.
(2) We descended into the meadows on the left below to reach the Rochers de Chironne, where there are some vertiginous views, so take care.
(3) Then return to the previous intersection.
(2) Continue along the ridge trail to the But de l'Aiglette and the Rocher de l'Aiglette.
(4) Turn right onto the path halfway to the Col de Vassieux and look for a secondary path on the right among the fir trees (marked with green and yellow crosses).
(5) From there, you will reach another trail that joins the Col de Vassieux. Continue downhill to the right and join a large forest track.
(6) From there, simply follow the track on the right until you reach the crossroads. Turn right and continue for a few metres.
(7) At the bend, continue straight ahead (still following the green and yellow markings) and you will reach the Col de Chironne.
(1) Retrace your steps to reach the car park (S/E).