ATV/UTV September 28, 2018 The same trail system that made West Yellowstone famous for snowmobiling is available for ATV and UTV use in the summer. Many trails are limited to machines under 50 inches, so make sure to inquire before heading out in your OHV or side-by-side. Managed by the U.S. Forest Service, the trail system is well marked Read More… from ATV/UTV