There is little to distinguish Copper Canyon from any run-of-mine frontier-feudin’ film. The hero is just as conventional, the villain is just as mean and the plotting is just as pedestrian as they are in a quickie from the Gulch.As a matter of fact the appearances of the western clichés in this case are rendered the more unmistakable by the presence of the stars in the cast. There is something slightly appalling about beholding Mr. Milland, a first-rate dramatic actor, engaging in saloon repartee and going through the conventional exercises of cowboy actors with horses and guns. And Miss Lamarr’s top-flight luxuriance in a typical frontier-charmer role — the lady who switches from the villains to the hero — is patently absurd. If the whole thing were done as a travesty, it might be something else again. But Jonathan Latimer has written it without humor and John Farrow has directed it that way.Indeed, the whole thing is so solemn and the clichés are so cut and dried that the audience at the Paramount yesterday morning seemed to find its chief amusement there-from. — Bosley Crowther, The New York Times, 1950.