movie question

what was the name of the movie from the 1970’s to the 1980’s where a group of young people get stranded in a forest where a evil forest ranger conjor’s up dinosaurs to chase and attack them and fight each other while they hide in a cave. the ranger also talks to them while riding on a horse or standing next to a tree. I also remember a yeller car maybe a charger, hitting one of the males and he ends up in a hospital

Equinox (1970) Featuring future WKRP actor Frank Bonner, who gave the most memorable line “Saaaaved by the Colonel.” The blonde, whose hair changes from one scene to another because it was filmed ver such a long period, was good friends with Stevie Nicks. And Ed Begley Jr. worked behind the scenes.

So the blond’s hair changed different colors of yeller, huh.

And in her later years, it was old yeller.