The exact route we walked in 2015 is shown on the map below (it can be slow to load), and was created on the Géoportail website. It may be enlarged by clicking the + sign in the top left-hand corner.
Zooming in to a scale of 500 m produces the TOP 100 map, and one more zoom (also with a scale of 500 m) shows the TOP 25 map, which is the view we use when making our homemade maps. The making of these maps is described here.
To see this map in full screen, click the icon in the bottom right-hand corner.