Louis French Reichardt is a noted American neuroscientist and mountaineer, the first American to summit both Everest and K2. He was also director of the Simons Foundation Autism Research Initiative, the largest non-federal supporter of scientific research into autism spectrum disorders and is an emeritus professor of physiology and biochemistry/biophysics at UCSF, where he studied neuroscience. The character of Harold Jameson, U.C.S.F. biophysicist and mountaineer in the film K2, is based on Reichardt, though the events of his actual 1978 K2 attempt with Jim Wickwire bear little resemblance to the plot of the film.

Rick Ridgeway is an American mountaineer and adventurer, who during his career has also been an environmentalist, writer, filmmaker and businessman. Ridgeway has climbed new routes and explored little-known regions on six continents. He was part of the 1978 team that were the first Americans to summit K2, the world's second-highest mountain. From 2005 until he retired in 2020 he oversaw environmental affairs and public engagement at the outdoor clothing company Patagonia. He has authored seven books and dozens of magazine articles, and produced or directed many documentary films.