Colin Farrell and the other cast members had to spend six weeks at a ranch, hanging out with cowboys and learning how to ride horses before filming began. Farrell rode a horse named Milagro while learning how to ride, and used that horse while shooting the film.
Out of 65 days of shooting, 45 were in temperatures of over 100 degrees Fahrenheit.
In the credits it is mentioned the use of footage from the movie Maverick (1994). It is the short scene of the paddle wheel steamer when Jesse and Zee are getting to Florida.