La Transju'Trails — Trail running in the Jura Mountains
The trail running event of the Jura Mountains, from Lamoura to Mouthe
About La Transju'Trails
Trail running in the heart of the Jura Mountains
Since 2008, La Transju'Trails has brought together thousands of runners and hikers every early June on the exceptional trails of the Jura Mountains. Organized by the association La Transju', this event follows in the footsteps of the legendary Transjurassienne cross-country ski race, partly using its historic route between Lamoura (Jura) and Mouthe (Doubs).
Courses for all levels
La Transju'Trails offers a complete range of distances adapted to all runner profiles:
- The 82 km Trail (and its relay format since 2025), the main event crossing the ridges of the Haut-Jura
- The 65 km Trail, a demanding course through forests and alpine pastures
- The 42 km Trail, the classic trail marathon
- The 25 km Trail, accessible to experienced runners
- The 15 km Trail and the 10 km Trail, for intermediates
- The 5 km Trail, open to all
- The 15 km Hike, to discover the course on foot
Exceptional Franco-Swiss routes
The routes of La Transju'Trails cross some of the most beautiful landscapes of the Jura massif: ancient spruce forests, wild valleys, panoramic ridges offering views of Mont-Blanc and the Alps, protected peat bogs, high-altitude pastures, and typical villages. Some routes cross into Switzerland, adding a cross-border dimension to the event. The permanent trail of La Transju', inaugurated in 2024, allows hikers and trail runners to enjoy the historic Lamoura-Mouthe route all year round.
A growing event
With over 5,000 participants in 2025 for its 18th edition and the introduction of the 82 km relay, La Transju'Trails continues to grow. The event takes place over a full weekend with a start village, entertainment, exhibitors, and local refreshments, in a festive and sporting atmosphere that is the pride of the Jura region.
La Transju'Trails — edition 2026
19th edition of La Transju'Trails on June 6th and 7th, 2026, in the Jura Mountains. Eleven events from 5 to 110 km, with a new 110 km ultra-trail between Champagnole and Les Rousses (4,350 m D+). More than 6,500 participants expected, registrations open on the official website.
A 19th edition marked by the Ultra
La Transju'Trails celebrates its 19th edition on Saturday, June 6th and Sunday, June 7th, 2026 in the Jura Mountains. Organized by the La Transju' association, the 2026 event offers eleven events from 5 to 110 km, with a goal of over 6,500 participants (compared to 5,000 in 2025).
The 110 km ultra, a major new feature for 2026
The main novelty of this edition is the launch of a 110 km ultra-trail connecting Champagnole to Les Rousses, with 4,350 m of positive elevation gain. Departure on Saturday, June 6th at 3 AM for this great adventure that plunges runners into the heart of the wild Jura: pertes de l'Ain, gorges de la Langouette, Foncine-le-Haut, ascent of the Chaux-Neuve ski jump, Combe des Cives, crossing to Chapelle-des-Bois then Morbier and Prémanon, before the triumphant arrival in the village of Les Rousses.
Exceptional Franco-Swiss routes
The routes cross the emblematic landscapes of the Jura massif: century-old spruce forests, wild combes, panoramic ridges, protected peat bogs, high-altitude pastures. Several events use sections in Switzerland with the mythical ascent of La Dôle, which offers spectacular views of Mont-Blanc and Lake Geneva. The passage over the viaducts of the Hirondelles line, the crossing of the Risoux forest and the Creux du Croue are among the highlights of the route.
A full weekend of activities
The event takes place over two days with a start village in Les Rousses, entertainment, exhibitors, refreshment area and local catering, in a festive atmosphere that is the pride of the Haut-Jura region. Bib collection takes place at the Omnibus hall in Les Rousses from Friday, June 5th to Sunday, June 7th.
Programme La Transju'Trails 2026
Friday, May 29, 2026 (opening event)
- 6:30 PM — Verticale de la Transju' · 2.35 km / 440 m D+ · Dry ascent of La Dôle · 150 bibs · 10 €
Saturday, June 6, 2026
- 3:00 AM — Ultra 110 km · 110 km / 4,350 m D+ · Start Champagnole → arrival Les Rousses
- 5:00 AM — Trail 82 km · 82 km / 3,740 m D+ · Franco-Swiss loop Les Rousses → Les Rousses
- 6:00 AM — Relay 82 km · teams of 2 to 4 runners · Les Rousses → Les Rousses
- 6:00 AM — Trail 65 km · 65 km / 2,870 m D+ · Loop Les Rousses → Les Rousses
- 11:00 AM — Trail 42 km · 42 km / 2,200 m D+ · Start Morbier (Stade des Marais) → arrival Les Rousses
- Youth Trail (schedules on official website)
Sunday, June 7, 2026
- 8:00 AM — Trail 25 km · 25 km / 1,260 m D+ · Les Rousses → Les Rousses (passing through Prémanon, Pont Perroud, summit of La Dôle)
- 9:15 AM — Trail 15 km · 15 km / 870 m D+ · Start Les Tuffes (Prémanon) → arrival Les Rousses
- 9:15 AM — Hike 15 km · same route as the 15 km trail, walking format
- 11:00 AM — Trail 10 km · 10 km / 350 m D+ · Les Rousses → Les Rousses (Fort des Rousses, Pont Perroud, Bief de la Chaille)
- 12:00 PM — Trail or Hike 5 km · 5 km / 80 m D+ · Fort des Rousses loop
Highlights La Transju'Trails 2026
- 19th edition on June 6th and 7th, 2026
- New for 2026: 110 km ultra-trail Champagnole → Les Rousses (4,350 m D+)
- 11 events from 5 to 110 km, over 6,500 participants expected
- Mythical ascent of La Dôle with Mont-Blanc / Lake Geneva views
- Opening Verticale on Friday, May 29 (2.35 km / 440 m D+)
- Registrations open on njuko, bibs collected at the Omnibus hall in Les Rousses
Prices La Transju'Trails 2026
Practical information — La Transju'Trails
Practical Information
Location
Start from Lamoura and Les Rousses (Jura). Finish in Mouthe (Doubs) for the long distances.
Access
- By car: Les Rousses is accessible from Geneva (1h), Lyon (2h), or Besançon (1h30). Shuttles between different sites.
- By train: Frasne TGV station (Dijon-Lausanne line), then shuttle buses.
Registration
Online registration on the official website latransju.com. Registrations usually open at the end of the year for the following edition.
Indicative Prices
- 82 km Trail: approximately 70 euros
- 42 km Trail: approximately 45 euros
- 25 km Trail: approximately 30 euros
- 10 km Trail: approximately 15 euros
- 5 km Trail: approximately 10 euros
Contact
- Official website: www.latransju.com
- Email: [email protected]
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Where does it take place — La Transju'Trails
Les Rousses (village d'arrivée) — Champagnole / Morbier / Prémanon (départs)
18 Avenue Charles de Gaulle, 39400 Hauts-de-Bienne, 25240 Mouthe