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At the end of the film, a written acknowledgment reads: "The Twentieth Century-Fox Film Corporation thanks the Canadian Government for its cooperation in the production of this motion picture." On May 15, 1952, Los Angeles Times reported that Louis Lantz' original story had been purchased as a vehicle to star Dale Robertson, and that Julian Blaustein would serve as the picture's executive producer. The news item also announced that the film would be shot on the Salmon River in Idaho. According to a November 1952 Daily Variety news item, Lantz was set to write the film's screenplay, but only Frank Fenton is credited onscreen.
Hollywood Reporter news items include the following actors in the cast, although their appearance in the completed picture has not been confirmed: Dorothy Skelton, George M. Patay, Mort Mills, Russ Conklin, John Fritz, Patricia Wright, Connie Castle and LaRue Farlow. Although a December 31, 1953 entry in Hollywood Reporter's "Rambling Reporter" column indicated that four separate endings for the film had been shot and that the studio was undecided about which one to use, this information has not been verified by another source. Hollywood Reporter news items do note, however, that retakes for the picture were directed in mid-November and mid-December 1953 by Jean Negulesco, who was filling in for the out-of-town Otto Preminger. In several modern interviews, Negulesco stated that he directed
According to studio publicity, the picture was filmed in the province of Alberta, Canada, in the Jasper and Banff National Parks, and on the Maligne, Bow and Snake Indian Rivers. According to Hollywood Reporter news items, filming was suspended twice because of injuries suffered by Marilyn Monroe, and several modern sources have commented on the physical hardships endured by Monroe, Robert Mitchum and Tommy Rettig during production. A modern source adds the following crew members to the production: Mitchum's stand-in Tim Wallace; Mitchum's stunt double Roy Jenson; Monroe's stunt double Helen Thurston; Rettig's stunt double Harry Monty; and Stunt coordinator Fred Zindar.