The premise of the Iron Horse Bicycle Classic (ironhorsebicycleclassic.com) is gloriously simple. The 50-mile road race begins in Durango, Colorado, and—6,700 feet of climbing and two mountain passes later—ends in Silverton. The historic narrow-gauge train takes an average of three and a half hours to make the journey. All you have to do is beat it.
20 Colorado Places That Will Literally Take Your Breath Away
Trek Mongolia's 2,456-square-mile Altai Tavan Bogd National Park. We recommend Tusker Trail's 15-day, 100-mile Mongolia Trek—16 guests, six camels, a local guide, and a cook cover eight to ten jaw-dropping miles per day by foot and horseback.