The second of Fritz Lang's three westerns (after "The Return of Frank James" and before "Rancho Notorious").
This is one of those "company" westerns, showing history being made, or at least some version of history, as some big company struggled to connect the East and the West, this time by telegraph.
Within this style, I did enjoy DeMille's Union Pacific (1939) a bit more, although this one is very entertaining and has several things going on for it.
The scenery photography is stunning, taking advantage of the early Technicolor. Also, the central conflict, with a convincing Randolph Scott trying to escape his criminal past and the shadow of his brother, was pleasantly poignant, with a good final shoot-out. The movie has a good pace too, at least in its second half, with plenty of action.
On the minus side, although very competently-made, it is a bit by the numbers, with the usual comical relief characters, ridiculous Indians, and in general few surprises (other reviewers were surprised by the ending, but in this case I was expecting it).
This is certainly quite common in classic westerns, but the romance seems to be included out of duty more than because it's an integral part of the plot.