I found some of these digging through stacks of old magazines at antique stores.
The Life Magazines are:
July 13, 1953 Sir Edmund Hillary and Tenzing Norgay
Sep. 20, 1963 First U.S. team to Climb Mount Everest
April 9, 1965 Senator Robert Kennedy climbs Mt. Kennedy in the St. Elias Range
National Geographics:
June 1974 Dennis Hennek on Half Dome in Yosemite
May 1979 Rick Ridgeway on K2
The July 2006 Arizona Highways has an article about the 15 Arizona County Highpoints.