Physically unimpressive, Camp 4 nevertheless "served as a seedbed for the exchange of ideas, training and the development of new equipment that vastly improved the speed and safety of climbing" (LA Times) during the time from after World War II until around 1970. From the 1970s on, a new group of climbers led by
Jim Bridwell and others based at Camp 4 (known as the "Stone Masters" from 1973 to 80) introduced a more athletic approach to climbing and popularized
free climbing. In the 1990s, Camp 4 was the site of ongoing friction between climbers and the
National Park Service. The conflict came to a head in 1997, when flooding in Yosemite Valley destroyed many employee housing units and the Park Service proposed to build a three-story dormitory complex near Camp 4. With the support of other activists, rock climber and climbing equipment manufacturer
Tom Frost initiated a lawsuit against the Park Service, arguing that the buildings would disturb the camp's natural setting. The suit was joined by the
American Alpine Club. A 2012 rockfall hazard report concluded that several campsites on the northern side of Camp 4 needed to be relocated to achieve adequate safety for climbers. The 2014 documentary
Valley Uprising features veterans of Camp 4 including
Warren Harding (dubbed "the original bad boy of Camp 4" for his risk-taking, rebellious attitude, and alcohol consumption), and
Beverly Johnson (who in 1973 was part of the first all-female ascent of El Capitan). == Reservations and availability ==