Park in the Étang de Chasselay car park.
(S/E) Walk back up Rue de l'Étang, ignoring the dead-end streets branching off to the right.
Turn left onto Rue des Darbonnières and then right onto Rue de Génévréant until you reach Chemin de Poleymieux.
Follow this path to the left, ignoring the paths on the left and right, until you reach the T-junction with Chemin de la Collonge.
(1) Take the mountain bike trail that heads into the undergrowth opposite, at the foot of a tree with a sign indicating that dogs must be kept on a lead, and follow this trail until it joins the path leading to Saint-Germain-au-Mont-d'Or. Continue along the path to the left for 350m.
(2) Take the path that climbs steeply to the right. At the top, keep to the right of the teepee-shaped tree hut and continue along the path.
At the next junction, turn left onto the gently sloping path.
When you reach the junction of the paths leading to Saint-Germain au Mont-d'Or, keep to the right.
(3) Turn onto the path on the right, with log steps, and arrive at a T-junction. Turn left onto Chemin de Chasselay and follow it.
At the signpost, turn right onto the path towards En Borde.
(4) Turn slightly right and continue to the mountain bike track, marked by a V-shaped tree.
(5) Turn right and follow the path for about 750m as it descends gently, ignoring the paths to the right and left.
(6) Turn left onto the path leading to La Madone.
Please note that the path is not clearly marked and there is a short steep section.
When you reach the Madone, there are rocks there where you can stop for a pleasant break.
Retrace your steps and take the path on the left.
Walk for about 100m, then take the path that descends to the left.
Be careful: there is a steep slope descending for about 150m.
(7) When you reach the path at the bottom, turn left then take the path leading off to the right.
Stay on the path that follows the stream.
When you reach the bottom of the path, with a meadow on your right, cross the stream via the small bridge and continue along the path. Pass the hairpin bend and head up the gently sloping path to the left.
(8) At the junction, turn right and follow the path uphill for 400m.
When you reach the geological trail, turn right towards Chasselay. Follow the path downhill for about 600m.
You will arrive at Montée du Plantin; Château du Plantin is on the right.
Walk down the Montée du Plantin and turn right into Rue de l'Étang, where the car park is located (S/E).