La Saintlo is a January trail and nature-running event in Saint-Laurent-d'Agny, a village approximately 30 minutes from Lyon. It features timed races through the village and surrounding countryside, with options for both regular trail runners and younger participants. The main distances are 15 km and 10 km for runners aged 16 and over, and a 3 km race for ages 11 and up. A 950 m “course des generations” pairs one child with one adult.
The longer routes are hilly runs, not flat road races: the 15 km course climbs about 450 m, and the 10 km course climbs about 260 m. Approximately 90 percent of the routes use paths with surfaces like pebbles and grass. The 10 km and 15 km runners receive a refreshment stop halfway. The race is organized locally by the Saint-Laurent-d'Agny family association and the Tennis Club des Coteaux, with volunteers assisting with course management and race-day logistics.