Student Tim Rogers was an extra in Red Runs the River and blew off a finger in a stage gun mishap. Concerned for his injury on her set, director Katherine Stenholm visited him in the hospital. He later became a writer for several of her films and ultimately took over as director of Unusual Films when she retired.
For the filming of the Second Battle of Manassas, a battery of cannon (six-pounders) were required to be fired in a single artillery barrage. Unusual Films was able to purchase several Civil War artillery pieces. To complete the close-up scenes, wooden replicas were fabricated by the construction crew. The wooden copies could be loaded and fired with surprising realism.
In 1964 "Red Runs the River" was selected by the University Film Producers Association to represent American colleges at the International Congress of Motion Picture and Television Schools in Budapest, Hungary.
The film required obtaining a narrow gauge railroad of Civil War vintage. "Tweetsie" was the answer. "Tweetsie" is now a tourist attraction in Blowing Rock, NC. The owners gave Unusual Films full use of the antique steam engine. In the film, "Tweetsie" changes her name twice. She appears as the "Orange and Alexandria Railroad," and again as the "Virginia Central." In the film's final scene, the train was heavily draped in black for the last journey of General "Stonewall" Jackson's body.
The Bob Woodward pictured with his credit is not the Bob Woodward who appeared in the movie. The Woodward that appeared in the film was a student at the time who was well versed in handling horses and did a lot of wrangling in addition to playing a minor part.