The Tarahumara live in the rugged canyons of northwestern Mexico. For them running is not only the best way to get from one place to another, it is an important cultural tradition. They regularly compete in races that can last days and stretch well beyond a hundred miles. During the 1990s, Tarahumara runners competed in several ultramarathons in the United States. Running in long, colorful shirts and sandals made out of rubber tires, they captivated the world with their strength and endurance.