With a rich history, the Iron Horse has become one of Colorado’s most spectacular 50-mile bike race that climbs more than 5,700 feet in elevation over two 10,000-foot passes. Professionals and recreational cyclists try to beat the train while they enjoy the incredible opportunity to ride from Durango to Silverton on the Million Dollar Highway closed to vehicles. A quarter-horse road ride to Purgatory, gravel ride, mountain bike and kids races, and a host of other family-friendly events keep hearts pumping for this beloved Durango classic. Do. Not. Miss.