Departure from the car park at Monnetier church.
(S/E) From the church car park (altitude 700m), leave the square and turn left onto the Route des 2 Salèves (this narrow street is quite picturesque; follow "Pierre Vieill"); walk a few hundred metres and turn left.
(1) Follow Chemin de la Ripette to the left. There is a short climb, then the path veers to the right and narrows to a trail crossing a large meadow, with the Bois de Château on the left and Mornex below. There is already a beautiful view of Le Môle and Le Bargy (Bornes) to the south-east and Le Grand Salève.
After a slight climb, you enter the forest; continue straight ahead until you reach the signpost for "Le Crêt du Châble".
(2) Continue straight ahead towards Pierre Vieille through the Bois de Châtaigniers. The path is fairly obvious, with regular markings (yellow arrow on a green background).
You will reach Pierre-Vieille (750m).
(3) Continue straight ahead for a round trip to Camp des Allobroges. After a slight climb, you will reach the "Camp" at 900m.
(4) Retrace your steps back to Pierre-Vieille.
(3) Turn left towards Monnetier Mornex; the path veers to the right and begins to descend. Cross the Pas du Châtillon and continue under its rocky outcrops (the foot of the walls is covered with wooded post-glacial scree).
There is a short section with a few "airy" passages (a cable is available for safety if necessary), then the path continues through the forest on the side of the slope on fairly "rough" terrain, which requires caution as the cliff is steep in places. You leave the forest to reach "Sur les Voûtes" (780m).
(5) Continue to the left, staying at the same level, choosing the well-marked path so as to pass over a few rocky steps. The route continues on flat ground, through a meadow, with the Bois de Château on your left and Monnetier-Mornex in the valley. You will soon have a clear view to the south of the Bargy massif and Mont Blanc, before gently descending to rejoin the outward route that takes you back to the car park (S/E).
, but we took a shorter route without getting out of breath.