(S/E) From La Boisseaude, take theGR®5towards the summit of Mont d'Or. First follow the trail, then take the road that leads to the car park below Mont d'Or.
(1) When you reach the car park, follow the ridges on your right along the small path, which joins the Swiss border.
(2) Follow it without crossing the border wall, and at marker no. 72, take the small path on the right to the Grande Échelle, then the Petite Échelle and finally the Authier barn.
(3) Continue along the path marked in yellow and blue, which joins a carriage road, and turn right to rejoin theGR®5.
(4) Take this on your right, which will take you back to your starting point via the road and then a path.