On the D41a between Cruseilles and Monnetier, drive past the Col du Piton and park at the side of the road in a small car park on the left, at an altitude of 1,300 metres.
(S/E) With your back to the car park, follow the road to the left, then cross it and head north-east, following the signposted route for “Grand Piton” and “La Croisette”. This will take you, a little further up at Les Chavannes, to the GR®5.
(1) Leave the path towards La Croisette and follow the GR® markings to the right through the mountain pastures. Reach the D41a road without joining it and stay roughly parallel to it. This will take you to the Col du Piton (car park).
(2) Cross the road, walk alongside the car park and climb for about ten minutes to the summit of the Grand Piton and the Bastian Tower (panoramic views of Geneva and Lake Geneva).
(3) Retrace your steps back to the Col des Pitons and the D41a road.
(2) Follow this road to the left to return to the car park (S/E).
