One of my very favorite made-in-Montana movies is one that you've probably never heard of: Danger Lights, a black-and-white drama released by RKO way back in 1930, in the early years of the talkies. The film is mostly a romantic drama with a fairly standard and cheesy plot -- two railway employees battling for the affections of a young Jean Arthur.
But the railroad setting makes makes it both historically noteworthy and lots of fun ... those scenes were shot in Montana, along the Milwaukee Road's main line across the state. There are action shots in remote Sixteen Mile Canyon, and lots of evocative images of steam locomotives in the railway's Miles City roundhouse and yards. They're great views by any standard, made all the more interesting to me by their location ... and their portrayal of a legendary, now-vanished railroad.
One of the movie's most dramatic scenes is a nighttime tug-of-war between two locomotives, supposedly staged as the evening's entertainment at a railroad employees' picnic. Here's a screen capture of the event: