This circuit takes you around the large lake of "La Plaine Tonique". It is a family trail along the lake and the river.
You go along the Reyssouze, and arrive at the mill of Cézille, acquired by the Syndicat Intercommunal de la Reyssouze, in order to create an eco-museum. Then, you will go around the gravel pits, which are still in activity.
Then you drive between the ponds where the fishermen are kings, before returning to the base.