Abstract The Aaron Belnap Ross photograph collection consists of 35mm color transparencies taken by Dr. Ross, mainly during his river trips on the Green, Colorado, and other rivers of the western United States from 1957 to 1971. These include the Green, Colorado, Yampa, San Juan, and other rivers. Besides scenes of camping, rapids, and canyons, Dr. Ross often photographed flowers, historical sites, and other river runners such as Don Harris,Jack Brennan, Otis "Dock" Marston, Jimmy Jordan,...