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. Services are available year around. Adjacent to the town of West Yellowstone, Montana, 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. Services are available year around. Open to wheeled vehicles from the first Friday of May 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.
Limited services are available near the South and East Entrances.
See our Road Construction Page for information about possible delays. Near the gateway community of Cooke City, Montana, this entrance is open year around for wheeled vehicle access to Cooke City through Gardiner, Montana, and the North Entrance. Opening dates for roads east of Cooke City vary from year to year, depending on the weather. Services are available year around. The West Yellowstone, Montana airport is serviced from June to early September.