Departure from the Parking des Affamés car park.
(S/E) Take the forest road that climbs to the right of the reservoir.
(1) At the end of a bend (elevation 1107), leave the forest road that climbs to the left and take the less marked path on the right. At the Grange Barthou, continue on a path climbing to the left until you cross the path coming from the Grange de Boëge (sign).
(2) Turn left and climb the fairly steep slope (the only difficult part of the route) to reach the Col du Pralère.
(3) Turn right, heading south, to reach Notre-Dame du Pralère (beautiful view of Geneva and the Salève). Retrace your steps.
(3) Back at the pass, follow the second path on the left (north-west) which climbs gently (GR® Balcon du Léman, red and white markings). This will take you to Pralère.
(4) Continue north-northeast to Pas de Marcy (still following the red and white markings).
(5) Continue north-northeast and finish the climb to Pointe de Brantaz.
(6) Continue north-west on theGR® to the Col du Prieuré and enjoy the view.
(7) Continue opposite on theGR® heading north-north-east until you reach a fork. Then take the slightly steep path on the left that climbs up to the Saut de la Pucelle (very beautiful view of the Jet d'Eau fountain on Lake Geneva). At the "Crête des Voirons" sign, continue north towards the Signal des Voirons. This will take you to the highest point of the hike, where you can enjoy the most beautiful view of both sides of the mountain!
(8) Continue straight north-northeast on the path that descends quite steeply towards Notre-Dame des Voirons (it is easier in this direction).
(9) Leave theGR® and turn right onto a wider forest road, which climbs gently up to the Prieuré car park.
(10) Cross the car park straight ahead and go around the Monastère de la Transfiguration on the left. You will quickly return to the Crête des Voirons sign (no need to go to the sign that takes you back to theGR®). Then take a path that descends gently to the left. When you reach a wider track, turn right to reach the Col du Prieuré.
(7) Turn right to head south-west and begin the descent, first along the hillside and then quickly into the woods. A yellow arrow on a green background indicates a path on the right, and another on a tree a little further on shows the path on the left: follow this path to the left. Descend gently along the path (which is sometimes difficult to see) south-southwest to Rochette Dessus.
(11) The Affamés car park is signposted again: cross the forest road and continue straight ahead (yellow arrow). At a T-junction, turn left. Continue downhill, south-west, to the car park (S/E).