The Semi-Marathon de Chartres is a road-race weekend in Chartres, Eure-et-Loir, featuring a half marathon of 21.0975 km, a 10 km race, and a 5 km race. It typically takes place in mid-March and has been held since 1999. The main timed races are FFA-labeled and serve as qualifiers for the French championships. The event also includes children's and junior races, with four youth courses.
The routes incorporate city streets and parkland areas surrounding Chartres, connecting the race to the prefecture rather than a contained stadium environment. The participant base is diverse: thousands of runners compete across the various distances, supported by over 200 volunteers. One recent edition recorded 5,019 participants. UNICEF is associated with the half-marathon, and the children's races have seen over 200 young runners raise awareness for the charity. The location offers a distinct backdrop: runners compete in a historic city overlooked by Chartres Cathedral. The program is designed to be practical and accessible for runners, offering shorter races, a certified half marathon, and family-oriented options during the same weekend.