Thirteen years after its introduction to the world, the Backyard Ultra endurance race format will be brought to Northwest Colorado in June. The last-man-standing competition will feature up to 75 of the area’s most daring.
Thirteen years after its introduction to the world, the Backyard Ultra endurance race format will be brought to Northwest Colorado in June. The last-man-standing competition will feature up to 75 of the area’s most daring.