Will Geer and Juano Hernandez also co-starred in Intruder in the Dust, which was also based on a novel by William Faulkner.
Mitch Vogel broke a shoulder during the shooting.
Actor Charles Aidman was originally cast to play the role of Maury, but Lonny Chapman replaced him when Aidman was called in by CBS temporarily to replace Ross Martin on "The Wild, Wild West" (1965).
The Winton Flyer was not a real automobile. It was created from scratch for this movie by Kenneth Howard, aka Von Dutch. The car was designed to resemble a typical vehicle from 1904, but built to withstand the rigors of filming. Steve McQueen called the car "the real star of the picture", and took possession of it after filming ended. It remained in his collection until his death in 1980.The actual car can now be seen in the Peterson Automotive Museum In Los Angeles.