This loop starts from the car park near the church of Saint-Germain-au-Mont-d'Or. The car park is located to the left of the building next to the church.
(S/E) Take Rue du Manoir until you reach a small square with a playground, cross it and join Rue du 8 Mai 1945. Follow this street to the left for 200 metres and turn right onto Rue de Champvieux. At the next crossroads, turn left onto Rue du Lurin and follow this road straight ahead until you reach Curis. Leave the church in Curis on your left and continue to the traffic lights.
(1) Cross the street. Take a moment to see an old wash house located a few dozen metres on the left towards Neuville-sur-Saône.
At the traffic lights, turn right towards Poleymieux and continue to the large gate marking the entrance to the castle grounds. Go through the gate and follow the path that runs along the left-hand side of the grounds. Follow this path, which turns left and then right. After this bend, you will come to an open space with a beautiful view of the castle. At the next crossroads, turn left and continue until you reach a large staircase.
(2) Take this road (signposted "Grande prairie") and follow the path on the left until you reach the "Grande Prairie" signpost. Continue along the path until you reach "Les Baysses". There are several benches along this path where you can take a break. The path passes to the right of a small chapel, the exits of which have been barred for safety reasons. When you reach the signpost for "Les Baysses", follow the signs for "La Croix Vitaise". At the fork after "Les Baysses", take the left-hand path and stay on it until you reach a road at La Croix Vitaize.
(3) Cross the road towards "Chargeri" and take the path that leaves the forest road on the left. This path joins the forest road after about 800m. Follow it for 50m and you will reach the signpost for "Chargeri". Take the path on the right that plunges into the forest towards Poleymieux-au-Mont-d'Or. After 200 m, you will find a signpost indicating the directions for "Poleymieux" and "Couzon". Turn left onto the unmarked path (please note: this path only appears on OpenCycleMap or OpenStreetMap maps, it does not appear on the IGN map). Follow this path and turn right to cross a field (please stay on the small, well-marked path) and join the road on the left to reach the Col de la Croix de Presle.
(4) Turn right and follow the road until you reach a large right-hand bend. Take the small road on the left at the end of the bend and follow it until you reach a right-angle bend. Then take the path that branches off to the left in the bend. At a right-angle bend, take the path blocked by a barrier and turn almost immediately right to reach the small chapel in a clearing.
(5) Take the small path that branches off to the right at the bottom of the clearing. The path is difficult to see due to the vegetation and is not shown on IGN maps. It joins another path, which you should follow to the right. This path runs alongside a fence until it intersects with a road.
(6) Cross the road and follow the path that enters the forest. Turn left onto the small road. Take the path that branches off to the left, which is not marked on IGN maps. Follow this path for about 500 metres and then take the path that branches off to the left, going uphill, and joins a crossroads.
(7) Cross the crossroads and continue along the road opposite, towards Limonest, for about 50 metres.
Take the time to admire the landscape before taking the path that branches off to the right on the hillside (not marked on IGN maps). Follow this path until you reach a road, which you will follow to the right until you reach a crossroads.
(8) Shortly after the crossroads, take a path on the left. When you reach the small road, follow the path that leads to the Py quarry (in operation). Look for the "Mont Rouge" sign.
(9) Follow the signs for "Lavoir des cendres". To do this, take the small path that branches off to the left just before the gate to the quarry. Follow this path until you reach a road and follow it to the right for about 50 metres until you reach a crossroads.
(10) Turn left onto the concrete path. After a few dozen metres, you will see an old wash house with a spring flowing from the rocks.
Follow this path down towards Saint-Germain, passing several old disused quarries. Continue until you reach the signpost marked "Les Fromentaux".
(11) Take a grassy path that branches off to the left towards Les Brosses and follow it for 400 metres. At the signpost for Les Brosses, take the small path that branches off to the right. Follow this path which, as it approaches a dead end serving properties, descends towards the village. At the crossroads with Rue Renardon, follow this road to the right until you reach the wash house.
(12) After seeing the wash house, take Rue du Lavoir for 20 metres and turn left into the Font-Chalin passage. This passage joins a small stream and passes under a house. When you reach Rue du 8 mai 1945, turn right, then take Rue de l'Église on the left, opposite a fountain, which will take you back to the starting point (S/E).