Few mountain towns are as well-situated for either on or off-road cycling as the Sun Valley and Ketchum areas. Families will love the meandering paved asphalt trails that go from the resorts into town, and the 20-mile route along the Big Wood River.

Hard-core roadies will want to charge up Highway 93 to Galena Summit, along a route raced by many of North America's top cyclists during the Ore-Ida races several years ago. Mountain biking ranges from thrilling 2,500 foot vertical descents to twisty single-track along remote mountain creeks. You can find accessible single-track trails from just about anywhere in the Valley, and seldom ever need to drive to a trailhead to start riding.

Before heading out, pick up a copy of Good Dirt: The Sun Valley Mountain Bike Guide. It's one of the wittiest fat tire guides you'll ever read - well-organized and indispensable.