NPS/Neal Herbert Every year in early November, most park roads close to regular traffic in preparation for the winter season. The only exception is the road between Mammoth Hot Springs and the northeast entrance, which is open to regular traffic all year. Once enough snow accumulates (usually by mid-December), roads open to “oversnow” travel only. This means the only way to visit Old Faithful, the Grand Canyon of the Yellowstone, and other popular destinations during winter is by guided snowmobile or snowcoach, or through the non-commercially guided snowmobile program. Winter travel hours are 7 am-9 pm. Oversnow travel ends in mid-March, when plowing crews begin clearing a winter’s worth of snow. Roads start re-opening to normal cars in mid-April. 
Snowmobile Access ProgramLearn about our non-commercially guided snowmobile program. 
Snowmobile Access Program LogisticsReview the logistics and regulations for the Non-commercially Guided Snowmobile Access Program. 
BAT SnowmobilesReview the list of snowmobiles that are allowed in the park. Authorized Snowmobile and Snowcoach Tour CompaniesThe following companies are authorized to provide snowmobile and snowcoach tours in Yellowstone.
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Last updated: January 24, 2023