Bieler Lauftage, also known as Courses de Bienne, is a running event held in Biel/Bienne, Switzerland, centered on a 100 km race. This main event anchors the program, which also offers runners shorter and more communal options: a half marathon, a night 10 km, a 10 km walk/fun run, and the Coop Kids Run for children.
The 100 km can be completed solo or as a 2-person or 5-person relay, attracting ultrarunners, teams, and individuals seeking the event's atmosphere without the full distance. Military categories are included in the 100 km race, continuing a long-standing tradition. The Oldies Run provides another age-specific format, and volunteers are essential for the smooth operation of the Biel/Bienne Running Days throughout the weekend.