Boone is filmed outdoors on a hill, looking down on a boarding house with his collar buttoned and wearing a white necktie. When he arrives at the house seconds later (on an indoor set), the tie is gone and the collar open.
As Paladin is riding to Big Pine, Montana from San Francisco, a distance of around 1800 miles, his voice-over states that the trip would take 3 days. If the horse walked the entire distance without stopping, it would take about 18 days. That assumes a horse walking at a fast 4 mph.