La Jasseronnaise - ND2BR - 20 km 2026

La Jasseronnaise is a trail race held in Jasseron, a commune in France's Ain department. The event provides multiple distances on paths and trails: 9 km, 20 km, 32 km, and 42 km. Participants can select a shorter local trail run or a marathon-distance challenge. The 32 km route features 1200 meters of elevation gain and is classified as Trail XS, indicating a compact, hilly course. The 42 km distance includes a team option, available as a relay for two or three runners, with a limit of 40 teams. Records indicate the event has occurred at least nine times. La Jasseronnaise also supports Les p'tits doudous bressans through contributions from participants, runners, and volunteers.