Of course, the complete trip to West Yellowstone would include a ride into Yellowstone National Park. Yes, it's open to snowmobiling. And it adds to the uniqueness of the West Yellowstone experience.
The community of West Yellowstone is also able to handle the crowds, which we admit, do come, with its plentiful accommodations and eating establishments. The town also offers the largest snowmobile rental fleet of anywhere we know of in the West. There are also guides available (a requirement inside the Park) who can show you all over the area.