Guidebook with maps/step-by-step
From the Maison du Lac, follow the voie verte (direction Rive Est) for a few dozen meters, before turning left to pass under the freeway.
Climb north through Nances, then Verthemex, to Saint-Paul-sur-Yenne and Saint-Jean-de-Chevelu.
Pass close to the Chevelu lakes, then reach Yenne via Billième.
Heading south again, you begin the most difficult part of the route: Mont Tournier. 10.5 km at 5.5% average gradient.
You then descend to the foot of the Col de la Crusille from Sainte Marie d'Alvey (2 km at 6%).
At the end of the stage, a final descent takes you back to the shores of Lac d'Aiguebelette.