Bull riding, the most extreme of the extreme sports, is a popular past time on the Navajo reservation in northwest Arizona. The reservation, the largest Native American reservation in the United States, stretches across the high desert of New Mexico, Arizona and Utah. What people think of as the heart of the Old West. Cowboying and rodeo isn't just a notion here, it's a way of life.

These Navajo cowboys spent a couple of days perfecting (or in some cases just learning) to ride bulls.