The Mormons are never identified as the religion in the film, as they were in Zane Grey's novel. But the story takes place in Utah, and the religious group is described as being persecuted and driven out of every place they had lived. Also, there is a book in a drawer with the Salt Lake temple on the cover.
This is the first adaptation of Grey's novel to completely eliminate the character of Jane's young ward Fay Larkin.