There are 15 ultrarunners who have run 100 100-milers. They each have a unique story. They are friends and have many common determined attributes.

The Western States Endurance Ride (Tevis Cup) was founded in 1955. 100 miles in one day. This part covers the the early years paving the way for the Western States Endurance Run.

Ultrarunning has roots in the endurance horse riding sport. Endurance riders established some of the earliest trail 100-miler runs including Western States 100. Part 1 covers the very early history of Endurance Riding from about 1814-1954,

John J. Seiler, "The Flying Yank" was a famous ultrarunner in the 1920s and 1930s. He thrilled fans with his stunts such as racing against cars in cities.

Ultrarunning races ceased during World War II, but during wartime some impressive "forced marches" were achieved by men in the military both on bases and in battle from 1941-1945.

The walkathons of the 1930s were brutal endurance events that attracted thousands of spectators. It was "Walk 'till you drop" and they lasted for months. They were similar to the more dispised dance marathons of the 1920s.

The early history of the 50-mile ultramarathon in America. The Road Runners Club of America and Ted Corbitt helped reestablish 50-milers in America during the 1960s. and way to prepare to run England's London to Brighton 52-miler.

In 1930, the best ultrarunners in American competed in Canada, in an eight-day 500-mile relay around southern Quebec, called the Peter Dawson Relay.

The Last Day Run was the first known American 24-hour race in the modern ultrarunning era. It was held indoors at the Los Angeles Athletic Club from 1965-1972

A 120-year history of crossing the Grand Canyon. The creation of the trails, bridges, water pipeline, and Phantom Ranch. The 1979-1991 races across the Canyon.