"The Color Run": World's most colorful 5K Pictures "The Color Run" 5K marathon is less about competition and more about exercise and enjoying a color-infused day. The event, which is being held in over 30 major cities, includes people of all different speeds, ages, shapes and sizes beginning at the starting line in a white shirt and getting pummeled with colorful dust at each kilometer. If you make it to the finish line, a final explosion of color powder awaits you. Though people can run for charities, this unique marathon encourage all walks of life to exercise. This photo shows participants in the 2012 marathon in Austin, Texas. Visit "The Color Run" website to learn more about the marathon. Credit: TheColorRun.com