Grandvi'Trail is a trail running and walking event in Grandvillars, located in the Territoire de Belfort area of Bourgogne-Franche-Comté in eastern France. It takes place in early October, with race options ranging from approximately 7 to 20 km, depending on the edition. Specific trail distances include 9 km, 12 km, 18.5 km, and 20 km.
The routes traverse natural and forest terrain within the Territoire de Belfort. This event focuses on an outdoor trail day rather than a large-scale road race. The 18.5 km trail is the most popular choice, and the 9 km distance is suitable for both runners and walkers. The previous edition attracted over 100 participants.