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From Bourg-en-Bresse, take the D936 towards Villefranche-sur-Saône. Stop at Châtillon-sur-Chalaronne and park at the Tourist Office near Place du Champ de Foire.
(S/E) From Place du Champ de Foire, follow the plane tree-lined promenade on the left. At the bottom of the square, cross Avenue Clément Desormes to cross Place de la République and arrive at the town hall. Continue straight on to Place de l'Hôtel de Ville and turn right onto Rue Alphonse Baudin. You will come to a crossroads.
(1) Turn left onto Rue du Président Carnot, then turn right at the end of the street, after the church and market halls, onto Rue Philibert Collet. Pass by the École Primaine Saint-Charles and turn left onto Rue Pasteur to cross the Chalaronne. You will come to a crossroads, Place Saint-Vincent-de-Paul.
(2) Turn right onto Rue Johnson, then at the Châtillon-sur-Chalaronne sign, turn left towards the castle. At the intersection, take the path that goes up to the old castle and walk around the ramparts. Go back down to Place Saint-Vincent-de-Paul via Impasse des Remparts.
(2) Turn right onto Rue Barrit. Continue for about 100 metres before taking the first passage on the left (Impasse de la Piétanée). Cross the Chalaronne again, then, at Place des Halles, turn right and continue along Rue Victor Hugo to Porte de Villars.
(3) Keep going straight ahead, then turn right onto Impasse du Parc to reach Clos Janin. Cross the river and turn left onto Route de Sandrans. Cross the road and continue straight ahead onto Rue des Peupliers. Follow the Chalaronne to reach the protected area of Prés Gaudet.
(4) At the lake, take the path on the right and go around the pond. Continue straight ahead until you reach the grove, then turn left to return to the Chalaronne and follow it on the right. Cross a bridge (Les Prés Gaudet signpost).
(5) Turn right onto the Buenand hill. Cross Route du Grobon, then the D2 and continue along the dirt track. You will reach the end of the track (Thiboloup signpost).
(6) Turn left and continue along this road for about 2 km until you reach the stream (Le Relevant Nord). Find a dirt track going up to the right.
(7) Follow this road to a place called Les Rodets. Turn right at the houses, then 100 metres further on, take a dirt track on the left. When you reach the hamlet, turn right to the junction with Chemin Champs de la Ville.
(8) Follow this road to the right until you reach the intersection with Chemin de Chanterelle. Keep to the right until you reach the hamlet of Chante-Poulet.
(9) Turn left towards the arboretum. Continue along the path for about 800 metres, then turn left 300 metres after a wood and enter the botanical garden. Follow the path straight ahead, then turn right. Continue to the pond and go around it on the right. You will arrive on the other side of the pond.
(10) Turn right to exit the arboretum. Continue straight ahead on the path. Pass the housing estate on your right, continuing to follow the path, which then turns into a tarmac road. At the end of this road, turn right and go down Boulevard de la Résistance. Continue to the stream.
(11) Turn left onto Rue Pierre Jéme and cross the Chalaronne. At the end of the street, turn right onto Avenue du Maréchal Foch, then cross Rue Gambetta and Avenue Clément Desormes, continuing to Place du Champ de Foire. Head back up to the Tourist Office (S/E) by taking the path lined with plane trees.
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Tourist office
