Question: when do the roads open in yellowstone?
Answer: Conditions permitting, roads will open to oversnow travel by snowmobile and snowcoach at 8 am on the following dates: December 15: West Entrance to Old Faithful, Mammoth to Old Faithful, Canyon to Norris, Canyon to Lake, Old Faithful to West Thumb, South Entrance to Lake, Lake to Lake Butte Overlook.