The Iditarod Trail Sled Dog Race will now start in Fairbanks, not Willow, due to a lack of snow, race officials announced Monday. The last-minute change follows alarms raised by some mushers over the weekend who said stretches of the trail were not safe for their teams.

A lack of snow along a dangerous stretch of trail has led organizers of the world’s most famous sled dog race to move the start of the Iditarod farther north.