Virginia, 1803. After the United States of America acquires the inmense Louisiana territory from France, a great expedition, led by William Lewis and Meriwether Clark, is sent to survey the new lands and go where no white man has gone before.
- Genre: Drama, History, Western
- Studio: Pine-Thomas Productions, Paramount Pictures
- Keyword: based on novel or book, based on true story, historical figure, interracial relationship, riverboat, scientific expedition, native american tribe, usa history, louisiana purchase, native american culture, 1800s
- Cast: Fred MacMurray, Charlton Heston, Donna Reed, Barbara Hale, William Demarest, Alan Reed