(NEWS RELEASE) Yellowstone National Park's winter season begins Dec. 15, 2025. Annually from mid-December until mid-March, visitors can travel most of the park’s roads from the West, South, East and North entrances by approved commercially guided snowmobiles and snowcoaches and via the non-commercially guided snowmobile access program. Currently, the accumulation of snowfall on roads varies across the park. This means that visitors will be able to travel in the park, however, the type of transpo