Snowmobiling here can be as easy as a rider needs it to be or as difficult as any horsepower junkie can handle. And everything in between. And we mean everything.
For starters there are about 500 miles of groomed trails and hundreds more ungroomed trails that criss cross just about all of Island Park. The trails-both groomed and ungroomed can be found at all elevations as well. In other words, not all trails are on the valley floor. Some reach nearly to the tops of the mountains in this area, including to the world renowned Mount Two Top (elevation 8,710 feet).
There are also ridgelines where you get a bird's eye view of the giant volcanic caldera (it blew about 1.3 million years ago) where Island Park is located. The caldera's south rim is just after you climb the hill out of Ashton and from there you're riding essentially in a giant bowl. The only other remnant of the caldera is the west rim, which is the ridgeline you see to the west as you drive north through the bowl. The caldera is about 18 miles long and 23 miles wide.