Hard ultramarathons in Wisconsin, United States

Rugged Ice Age Trail route through Chequamegon-Nicolet National Forest, featuring glacial landscapes, tranquil forests, and open prairies

Nordic Blue loop course with 1,500 feet of elevation per 9.19-mile loop, rolling trails, and Wisconsin’s variable weather

Winter endurance event on the Tuscobia State Trail with 160-mile and 80-mile options for runners, bikers, and skiers in Northern Wisconsin