Departure: Park at the Aubépin hamlet parking lot. There is a small parking lot where you can leave your car. There's a hiking signpost on the other side of the road. Follow the main road downhill towards "Grand Oriol". Follow the smaller road branching off to the right. This will bring you to the second signpost entitled "Grand Oriol".
1) From "Grand Oriol", drive through the village in the direction of "Serre du Thau". There's a good asphalt climb ahead. It allows you to climb quickly and leave the village to find yourself in the middle of fields. The first interesting view is of the Dévoluy massif. Continue along the track until you reach the "Serre du Thau".
2) From "Serre du Thau" continue towards "Serre des 9 églises". The path is still very pleasant and allows you to take full advantage of the surrounding views. You'll soon reach the Serre. Then head for the belvedere below. A short round trip will give you a magnificent view of all the peaks of the Trièves.
3) Once back at the "Serre des 9 églises" post, head for the "SerrPrince right to reach the Serre of the same name. A long stretch of road brings you to a new yellow post indicating the "Serre du Villlaret".
4) Once at the "Serre du Villaret", follow the signs for "Richards", going downhill through the forest to the hamlet. Then cross the hamlet and follow the signs for "Petit Oriol". Once you've passed the road again, turn right into "Petit Oriol".
5) From the "Petit Oriol" signpost, follow the path to the right towards "Eaux d'Oriol". This pleasant track takes you alongside the Grand Oriol stream. At the "Eaux D'Oriol" signpost, follow the signs for "Grand Oriol". A short climb will take you to the hamlet of Grand Oriol, which you passed earlier. Then head for "Aubépin", following the same path as before, to reach your starting point at "Le Villaret". After a stretch in the forest, you cross a field to reach the gullied road where the next "Le Villaret" post is located.