Our hero meets some groovy, fur-lined mountain man. As they ride off down the misty river he explains in voice-over how aforesaid mountain man was the most extraordinary human being he'd ever met.
Voice-over is a way of avoiding having to dramatise anything. Who needs character-revealing incident when you can have shots of horsemen riding off down the misty river and a voice telling you how exciting it all is?
The hero is boyishly handsome. The heroine is so classically good-looking you'd hardly guess she had Native American genes. The whites are bigoted (of course). The Indians are spiritual (of course). "We have a wheel that gets us from place to place, they have a wheel that takes them to the stars".
The usual racist, stereotypical junk- and not even fun.