The 406 Race Series, based in Billings, Montana, organizes high-quality, community-driven running and multisport events for participants of all ages and abilities. Known for their fun atmosphere, awesome swag, and community support, their races feature well-marked courses, timely results, and a focus on safety. The series aims to connect people through movement and outdoor activities, often partnering with local organizations and causes. Events include trail runs, marathons, duathlons, and triathlons, catering to both beginners and experienced athletes.