The train in the opening credits and closing scene is Colorado's Durango & Silverton Narrow Gauge Railroad, which was then the Denver and Rio Grande Western. In 1971 the DRGW was still owner and operator of the line, and this track was still part of a class 1 railroad and not a tourist / heritage railroad. Even though DRGW was looking at the time for a buyer or just the permission to the interstate transportation board for abandonment of the rail grade. They would find neither until the mid-1980s. The scene was reused a year later in the Italian western comedy Man of the East (1972).

James Garner, Jack Elam, Harry Morgan, Henry Jones, Walter Burke, Willis Bouchey, Gene Evans and Kathleen Freeman all appeared together previously in Support Your Local Sheriff! (1969). Though this film is not a sequel to that one --all the above actors play entirely different characters in a different town--they all played similar characters to those they play here.

As this was a Cherokee Production, which was James Garner's own production company, there are many familiar faces, cast members who worked with Garner on his series, including The Rockford Files (1974).

James Garner and Suzanne Pleshette would later guest star together on 8 Simple Rules (2002) after John Ritter's death in 2003, as a result, Garner became a regular cast member on the show until the series finale in 2005.

Miss Hunter's College on the Hudson for Young Ladies of Good Families, which Patience wanted to attend, is now Hunter College on 68th Street and Lexington Avenue in New York City, part of the City University of New York.

Continuity

In the bar fight, Patience sees Latigo lying face-down on the floor with nobody near him. In the close-up, Latigo's laying face-up with his head on the leg of another unconscious cowboy.

In the bar fight, Patience places an empty beer mug on the chest of the knocked-out guy on the floor next to Latigo. The mug changes position by 90 degrees in the subsequent shot.

The same two men hurriedly pass together right behind Swifty Morgan twice after he arrives in Purgatory and begins walking down the street, once in close-up of Swifty, and again a short time later from a different angle further away, clearly the same footage from different angles used twice to lengthen his stroll down the street.

The shaving cream on Latigo's face in the barbershop scene changes between shots.

When Latigo tells Goldie his thoughts aren't worth a penny, she isn't touching him. In the next shot her arm is draped over his shoulders.



Incorrectly regarded as goofs

The mistaken idea that this movie is set in the late 1800s is due to Miss Hunter's College starting in 1870 as the Female Normal and High School. Patience could not have known the name "Hunter's College" because it was not called that until 1914. There are a number of Anachronisms based on the belief that the movie is set far earlier than it actually is. Cutty Sark whisky introduced in 1923, Kewpie dolls- 1910 and iron railway trestles: several thousand iron bridges were built in America between 1840 and 1880. Further, the Denver & Rio Grande Western Railway that Jug is delivering his summation from, consolidated in 1910.



Revealing mistakes

When the miner shoots his rifle down at the feet of Latigo Smith, he is clearly aiming about 10-15 feet to the left of where the bullet hits the ground.



Character error

Before he succumbs to it, Latigo states that in roulette the house has an 8% advantage and wins outright once every 12 spins. In reality, the house advantage is 5.26%, winning outright once every 19 spins.