Grande Traversée du Jura
420 km · +9,500 m · 5 days · Gravel · Challenging
Best: May–October
A 420 km north-to-south traverse of the Jura Mountains by bike (gravel or MTB) — from Mandeure to Culoz along the Swiss border, through one of France's most underrated mountain ranges. Five days of dirt roads, forest trails, and singletracks with 9,500 metres of accumulated climbing. The GTJ follows a fully waymarked route through the Doubs gorges, the Haut-Jura Regional Natural Park, vast spruce forests, alpine pastures, and the limestone combes that give the Jura its character. The terrain is never flat: ascents and descents are part of the daily routine. Accommodation along the way ranges from village-owned gîtes d'étape, campings and CAF mountain refuges — cheap, simple, and welcoming. The route ends with the climb to the Grand Colombier, a legendary Tour de France ascent, before the final descent to Culoz. Both Mandeure and Culoz are reachable by regional trains from Lyon that allow bikes, making logistics straightforward. This is one of the classic European bikepacking routes — a full week in the mountains with everything you need on the bike.



