Many people enjoy exploring Yellowstone by snowmobile or snowcoach during the winter months. Most park roads are not plowed and become snowpacked during the winter. Some are open for travel using snow machines. A snowmobile trip into the park creates lasting memories of snowy landscapes, steaming geyser basins and incomparable wildlife viewing.
The snowmobile season begins on December 15 and extends until March 15 (weather and snow conditions permitting). The East Entrance does not open until December 22 and it closes March 1. Travel over Sylvan Pass on the East Entrance Road is subject to avalanche-related safety delays and closures.
People wishing to visit the park on a snowmobile or in a snowcoach must either travel by commercial snowcoach or accompany a commercial guide on snowmobiles. (Private, unguided snowmobiles or snowcoaches are not allowed.) Best available technology snowmobiles are required, and there is a daily limit on snowmobile and snowcoach entries. Off-road use of snowmobiles and snowcoaches is prohibited in the park.
Winter dates, activities, rules, etc. can change unexpectedly. Always check at the gate or visitor centers for the most current information. For more information about issues affecting winter travel in the park, see the park website's Winter Use Planning section.
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