When the snow sloughs away, Silver Mountain is home to the region's premier fat-tire playground in Idaho. The mountain's extensive network of downhill mountain biking trails is accessed via the world's longest gondola. From the time you unload at the top of the mountain, you're in for a roller-coaster mountain biking descent back to the resort's Gondola Village. When you reach the bottom, load your mountain bike back on the gondola and do it all over again. Take as many laps as you have energy for throughout the day.