Is a costume mandatory at the Marathon du Médoc?

Yes—and it’s even written in black and white in the rules: “the Médoc is run in costume.” A different theme is imposed every year; for 2026, it’s off to the 80s. If you don’t have a costume, you risk being refused a start. The organizers encourage creativity, with no limits on budget or style. A real carnival at this marathon like no other.