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Grande Traversée du Jura - GTJ The GR 509, GTJ trail, or Grande Traversée du Jura, connects Mandeure, in the Doubs, to Culoz, in the Ain, on a 400 km route, passing through the Doubs Gorge, the Haut-Doubs, the Park natural region of Haut-Jura and Bugey.
Check these different things before going on trail !
Don't forget anything
Preparation for a trail can be messy. Downloading the track, applying for a permit, renting/buying specific gear, manage food resupply are all kind of tasks hikers must do before leaving. If you thing about something people shoudn't forget, here is the place.