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. Bus service from Bozeman, Montana, to West Yellowstone, Montana, via Highway 191 is available all year. Bus service directly from Idaho to West Yellowstone is limited to the summer months. Commercial transportation from Bozeman, Montana to Gardiner, Montana is available during the winter and summer seasons. Commercial transportation to the park from Cody and Jackson, Wyoming is available during the summer season.