I adore watching movies, but if I had to pick just one it would be
The Last of the Dogmen starring Tom Berringer and Barbara Hershey. I know, obscure, right? But excellent.
It is about a group of Cheyenne who escape in the 1850's to a mountain range in the Oxbow region of the Rocky Mountains and stay hidden from the world until current times. It's got it all, romance, cowboys, a smart horse, a smarter dog, a sheriff with an attitude, and Wilford Brimley as narrator. Who could ask for more?