Iditarod 2025 Rules And Regulations. Stay up to date on the latest moves in the 2025 iditarod! The iditarod trail invitational is the world’s longest winter ultra marathon by fat bike, foot and ski and follows the historic iditarod trail from knik to nome.
Download the latest version of the 2025 athlete guide by clicking the button below. The 2025 iditarod kicks off saturday with a ceremonial start in anchorage followed by an official race start in willow on sunday.