Yellowstone Park Closes to Over the Snow Travel
Roads will close to oversnow travel by snowmobile and snowcoach at 9 pm on the following dates:
- March 1: East Entrance to Lake Butte Overlook (Sylvan Pass).
- March 4: Mammoth to Norris.
- March 6: Norris to Madison, Norris to Canyon.
- March 11: Canyon to Fishing Bridge.
- March 15: All remaining groomed roads close.
No entrance except ski or bike until April 20, 2018. (Weather depending)