In 1975 Cavin Woodward of England crushes the 100-mile world record. Tom Osler of New Jersey impacts 100-mile training using run/walk strategy

Marcy Schwam was an ultrarunning pioneer in the 1970s and early 1980s, She won about 30 ultras and set at least six world records at all ultra-distances.

Charlie Trayer was one of the greatest “short-range” American ultrarunners of the 1980s. He is credited for bringing American ultrarunning to the world stage.

Park Barner of Pennsylvania was one of the greatest ultrarunners in the 1970s. His steady pace won him the world record for the 24-hour run of 162 miles in 1979

Footraces were held hiking and running across the Grand Canyon rim-to-rim from 1970-1991 participated at times by more than 100 people.

Bruce and Mary Aiken moved to the bottom of the Grand Canyon at Roaring Springs in 1973 and stayed for 33 years, raising their children there. Legends of the Canyon

The construction of the trans-canyon water pipeline and its destruction by the massive 1966 1000-year flood that nearly destroyed Phantom Ranch.

The history of crossing the Grand Canyon on foot, rim-to-rim. The improvements made by the CCC. The first rim-to-rim hikes in a day during the 1950s and 1960s.

The history of crossing the Grand Canyon on foot, rim-to-rim. The trails, builders, bridges, mines, and Phantom Ranch. Part 1.

Dave Kunst was the first to walk around the world in the modern era in 1970-74. His walk was inspiring but also resulted in death, deception, and betrayal