Obviously, it's a Western. And, in fact, the only movie I know of that's both western and film noir. Let's list the noir characteristics: 1) The anti-hero. Dale Robertson plays a "leave me alone" kind of gambler. 2) High contrast visual effect. Most of the movie is wonderfully lit by the fireplace alone. 3) No-nonsense dialogue. The only thing it misses is the 4) Femme fatale, although it seems that Miriam Hopkins as the fallen woman is supposed to be that but there aren't any scenes of her actually being "bad."