November through April, the North Entrance provides the only access to Cooke City, MT . US Highway 212 east of Cooke City is closed to wheeled vehicles November through April. The road from Mammoth to Norris is open to wheeled vehicles from the third Friday in April through the first Sunday in November, and to tracked oversnow vehicles from the third Wednesday in December to Monday of the first full week in March. Closest airline service is Bozeman, MT . See the Road Opening Schedule for more information.
Services are available year around.
West Entrance - Adjacent to the town of West Yellowstone, MT , the West Entrance is open to wheeled vehicles from the third Friday in April through the first Sunday in November, and to tracked oversnow vehicles from the third Wednesday in December to Monday of the second full week in March. Closest airline service is West Yellowstone, MT , Idaho Falls, ID , and Salt Lake City, UT . See the Road Opening Schedule for more information. Services are available year around. Limited services are available near the South and East Entrances.