The Sla'Vengers Trail is a costume-friendly nature running event in Thionville, Moselle, France. It takes place near the end of June. The primary offering is a 10 km trail with approximately 250 m of elevation gain and a 2-hour time limit. More challenging routes are available for those seeking greater elevation. Walkers are welcome, making the event accessible beyond trail running specialists.
The race supports research for Charcot's disease (ALS/SLA), with all profits donated to this cause. Participants are encouraged to wear superhero costumes, contributing to a festive atmosphere while maintaining focus on the fundraising objective. A unique segment is La Boucle du Lepreux: a 750 m loop with 60 m of climbing, to be completed as many times as possible within 2 hours. The standard nature course measures about 11 km with 350 m of positive elevation. Portions of the event utilize public roads or roads open to traffic.