Call ahead to check road conditions. The number for the park office is (307) 344-7381. Some roads close seasonally due to snow. Generally this is December through March, but weather is unpredictable.
Traveling east on I-90, exit onto Highway 89 south near Livingston, Montana. The park is approximately 57 miles from the interstate. You are going to cross the state line into Wyoming about three miles before you reach the north park entrance.
Consider taking a scenic route into Yellowstone National Park. Leave I-90 at exit 9 in Wyoming and follow alternative Route 14 to the eastern entrance. This route takes you through the Big Horn Mountains and is approximately 220 miles. It's long, but shaves off more than 200 miles of your drive on I-90.
Obtain a park map at the entrance and decide what you want to see. Old Faithful and Yellowstone Lake are on the southern loop of the figure eight. Old Faithful is approximately 51 miles from the north entrance. Mammoth Hot Springs is on the northern loop near the entrance.
Consider time and traffic when choosing your destinations. Yellowstone is a big park that gets a lot of visitors. Cars commonly line up on the side of the road for a better view of wildlife. Drive carefully and stop at some of the less famous destinations where there is less traffic.
Obey all traffic and parking signs. The entire park is volcanic and pieces of parking lots have been known to simply blow out from underneath. If an area is taped off, it's best not to park there.
Exit the park by either returning to the highway the way you came or by taking the scenic route back to I-90 through the east entrance. Westbound travelers can exit through the north entrance and follow Highway 89 back to the interstate.
