Located in the heart of the Jura, in a region of lakes and mountains, this circuit is for lovers of nature and tranquility. You will start in the village of "Les Crozets". You will then dive into the immensity of fir forests before joining "Le Grandvaux", a unique plateau with many facets. Located in the Regional Natural Park of Haut-Jura, the combe du grandvaux allows the practice of multiple activities: cycling, cross-country skiing, snowshoeing, mountain biking, hiking... The rest of the route will take you to Etival, known to all. for its two pretty lakes hidden in the bottom of a very pleasant valley. The first is the wildest and the surrounding flora of the richest. The second, called "Great Lake" is lined with meadows and forests giving it a unique character. After skirting the big lake, you will only have 4 km left in the Jurassic plain before joining Les Crozets.