In Bossieu, follow the signs for "Etang du Grand Bois". Park at the edge of the pond (S).
Return to the tarmac road you arrived on. Turn right (north-west). Ignore a path that branches off to the right and, at the fork, take the right-hand branch (north-west).
(1) You will reach the "Petit Jean" pond, which you will follow on your left. Ignore the path that branches off to the left and, at the fork, take the right-hand path (north-east).
(2) When you reach the "Guy" pond, turn right (southeast). Pass the "Pelisson" pond and continue to the junction with the "Neuf" pond.
(3) This is the trickiest part. Take the second path on the left (there are signs) more or less opposite.
You will arrive at the "Coquet" pond. Go around it on the right (it is a little hidden).
Continue along the path, ignoring any paths leading off to the right or left. Keep following the yellow markings.
(4) You will come to a small paved road, which you take on the right (south). Then take the first path on the right (southwest) and follow it until you leave the woods. Turn left and descend towards the Liers plain. Continue to follow the yellow markings.
(5) When you reach Chemin de Bossieu (in the commune of Arzay), turn right (west)
(6) At the Route de la Guillotière, turn right, then left and right again.
We have passed Combe d'Agnière and are climbing back up towards the plateau.
Turn left along the trees (south), then right and immediately left (west)
(7) The path leads to a small paved road, which we take to the right (northwest).
This takes us back to the car park at the Grand Bois lake
