Ellsworth and Emery Kolb were early Grand Canyon explorers, adventurers, photographers. and rim-to-rim guides. They photographed 1.5 million people in the Canyon across 70 years and their studio still

Prof Thomas Cureton (1875-1957) of Williams, Arizona, guided nearly 50 young men and women across the Grand Canyon and back the 1920s.

In the early years, guides were used to cross the Grand Canyon. In 1913, Theodore Roosevelt was guided across the Canyon to hunt mountain lions with his sons.

Frank Hart was truly one of the greatest American ultrarunners of the 19th century. He died in 1908, forgotten, buried by charity, with no family in attendance.

By 1888, Frank Hart had raced in about 30 six-day races in nine years. He had reached 100 miles or more in about 40 races and had won at least 30 ultras. It was evident that his career was declining.

Frank Hart's life in 1883 was at a low point. He had squandered his riches and damaged his reputation as a professional pedestrian. He wanted to make a comeback

Tom Osler (1940-2023) of Camden, New Jersey, was a mathematician, national champion ultrarunner, and author. His running training theories impacted thousands

The 2023 Barkley Marathons course at Frozen Head State Park in Tennessee was conquered for the first time in six years, won by Aurelien Sanchez, from France

Encore episode. The Barkley Marathons in Tennessee, is likely the world's toughest trail race. Its birth was inspired by the mountains, a prison, and a famous escape.

In 1880, Frank Hart was recognized as one of the top ultrarunners/pedestrians in the world. But then a rival appeared on the scene full of racist hatred.