On September 29, 1949, four horses were injured and two killed while shooting a horse stampede scene. That same day, a 30-minute rainstorm caused a flash flood, which ruined about $10,000 of Technicolor photographic equipment. Hendrix came to the filming with a still-painful broken foot she had suffered earlier. She had nosebleeds and shortness of breath from the altitude in Utah, and in one scene, she was stung on the neck by yellow jackets. Murphy, already troubled with ulcers, nightmares, and PTSD from his war experiences, had severe cracked and blistering on his lips from the sun and literally could not smile due to the pain. Because Universal-International felt this was too noticeable on screen at times, after main production ended, a few of his scenes were re-shot later at Universal Studios. Main filming ended on October 3 and the next day, back in Hollywood, Hendrix announced that she and Murphy were separated.
Murphy and Hendrix were married in real life; this was their only film together. Sadly, they divorced shortly after.
During editing, some stock footage from 1949's Le Mustang noir (1949) was used in the wild horse stampede segment.