West Yellowstone , Livingston , Big Timber , Cooke City , Bozeman , Big Sky , Gardiner . Trails begin in town where cars and sleds share city streets. Choose from 200 miles of groomed trails inside the Park and more than 400 miles outside. Season runs Thanksgiving through April. The World Snowmobile Expo, held annually in March, serves up the world's most exciting racing action and all that's new in the world of snowmobiling.
Dates vary with snow conditions.
Trails Yellowstone National Park roads, with the exception of Mammoth to Cooke City and Canyon Junction to Tower Junction, are open to snowmobiles. Persons operating a snowmobile in Yellowstone National Park must possess a driver's license or state issued learners permit. Snowmobile sales, service, and rentals as well as lodging and food are available in West Yellowstone. Lodging,, food and fuel are also available at the Old Faithful Snow Lodge, and Mammoth Hot Springs. Fuel is available at Canyon.