The SaintéLyon is a legendary night trail running race from Saint-Étienne to Lyon. Created in 1952, it's one of the oldest and most iconic trail races in France. The race takes place on the first weekend of December, with runners navigating through the Monts du Lyonnais during the night, creating a mesmerizing 'serpent of light' with their headlamps. The course combines roads and trails with around 23,400 participants annually.