Marche audax 100 km des Yvelines à Montigny-le-Bretonneux

The Marche audax 100 km des Yvelines has two distances. Participants must be 18 or older. Both courses begin at the gymnase de La Couldre. The short route ends at the Plaisir Grignon train station, and the long route finishes at the gymnase de La Couldre. Electronic chip timing is included.