When unseasonably warm temperatures left the Iditarod course unusable, organizers were forced to reconfigure a 1,128-mile course through the Alaskan wilderness. The result is a race like nothing before in the event’s 53-year history.

Thanks to a lack of snow, this year’s edition of the Iditarod Trail Sled Dog Race needed a new route across the Alaska wilderness. The course change adds more than 100 mile.