For a winter speed thrill of the machine-powered variety, hop on a snowmobile with Red Pine Adventures (2050 W. White Pine Canyon Rd. 435/649-9445 or 800/417-7669. www.redpinetours.com), and follow your guide along private groomed trails adjacent to The Canyons resort. Thousand Peaks Snowmobile Adventures (435/645-9292 or 888/304-7669. www.thousandpeaks.com) operates backcountry snowmobile tours on one of Utah's largest private mountain ranches just minutes from Park City, where you can catch a free shuttle. Clothing, such as snowsuits, gloves, and boots, are available to rent.