PROTECT YOUR TRAILS... JOIN MINNESOTA UNITED SNOWMOBILERS ASSOCIATION Minnesota United Snowmobilers Association (MnUSA) was organized in 1978 to protect, preserve and promote the sport of snowmobiling throughout Minnesota through favorable legislation and programs. Through the years, MnUSA has become a state and national leader in recreational support. Minnesota today enjoys over 20,000 miles of snowmobile trails because of combined efforts of local snowmobile clubs, State and Federal leaders, Department of Natural Resources and snowmobile volunteers.