Action galore within a well-crafted and beautifully presented story make this one of the very best B westerns ever made.
Randolph Scott's mustache is rather jarring, to those of us who have never seen him with one, but he gives an excellent and athletic performance, joined by one of the finest casts ever assembled in a B western.
Bad guys are really bad, with Noah Beery giving one of his best performances as the worst of the bad guys ... although Mrs. Bad Guy is about as rough and evil as any woman I've ever seen in a B western.
This is not only brilliant story-telling, but it is brilliant acting.
And brilliant directing.
Henry Hathaway surpasses other possibly better-known and more highly regarded directors with his moving camera and his shots of moving horses and wagons and buffalo. (His last years, though, saw him faltering badly as he almost ruined, with the aid of a miserable script from Marguerite Roberts, "True Grit." But admire his work here and don't think about how badly he stumbled toward the end.)
One wonderful aspect of "The Thundering Herd" is an active female lead, played by Judith Allen. OK, maybe there was a stunt man, but so what? The character is one to admire, and one to wish there had been and were now more of: a strong and active female who did more than cower in her man's arms.
Excellent writing, and an excellent and exciting bunch of characters, and an excellent action-packed finale.
"The Thundering Herd" is available at YouTube in a pretty good print. I highly recommend this movie.