La Transju'Trails — Trail running in the Jura Mountains

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.