Bicycles and trains were invented at roughly the same time in human history. Every year, the Iron Horse Bicycle Classic pits one against the other in Colorado. Started by Jim and Tom Meyer decades ago, in 1972, the ride sprang out of a simple boast. Now, it draws thousands of cyclists each year. In 2016, 2,500 cyclists from 43 states and 6 countries accepted the challenge. Can you guess how many of them beat the train?