The Yellowstone Non-Commercially Guided Snowmobile Access Program offers adventurous individuals a unique opportunity to explore the park's winter wonderland on snowmobiles without commercial guides. Groups of up to five snowmobiles can apply for permits via an annual lottery, with trips lasting between one and three days. Participants must operate New-BAT standard snowmobiles and complete an online education course, providing a more independent way to experience Yellowstone's stunning winter landscapes and geothermal features.