Yellowstone has five entrance stations, the North Entrance, Northeast Entrance, East Entrance, South Entrance and the West Entrance. It takes many hours to drive between these entrances, so be sure to check the status of roads at the entrance you intend to use. Most park roads are closed to regular vehicles from early November to late-April (see dates below) when the park switches to oversnow travel (snowmobiles and snowcoaches). The only road open year-round to automobiles is from the North Entrance at Gardiner, Montana, through the park to Cooke City, Montana (via Tower Junction). Travel east of Cooke City (via the Beartooth Highway) is not possible from late fall to late May. All dates listed below are subject to change depending on weather and budgetary restrictions.
The map below shows the status of park roads and road construction. Click on a road segment or colored icon for more detailed information. Conditions in Yellowstone can change quickly, especially during spring and fall. Updates to this map may be delayed, so check back often. Short-term road closures and delays may not be shown on this map.
Map showing the road and entrance dates for automobiles. Weather permitting, roads open/close at 8 am on the day shown. Changes and delays are possible.
Conditions permitting, roads will open to regular (public) vehicles at 8:00 am on the following dates. Colors listed after the dates correspond to the colors on the 2020 Spring Opening and Fall Closing map.
All information from https://www.nps.gov/yell/planyourvisit/parkroads.htm