Starting from the Maison du Lac, this itinerary will lead you to the Croix du Signal. After a 1km warm-up on the road, you will enjoy a very fun single-track path to reach the Doria villas. You will discover the Grotte du Loup and the ruins of the Château de l'Epine. Then, you will join the summit on more sustained slopes. The descent will be through the woods before reaching more open spaces above Marcieux and Novalaise villages. You will return to the riverside of the lake by following some nice paths along the river for the last four kilometres.
Caution: at km 8, there are ladders to climb. Possibility of an alternative route bypassing the route indicated as a variant