- Country: USA
- Genres: Animation, Fantasy, Short
- Release: 1918-11-17
- Director: Willis H. O'Brien
- Writers: Herbert M. Dawley , Willis H. O'Brien
- Language: None
- Stars: Alan V. Day , Chauncey A. Day , Herbert M. Dawley , Willis H. O’Brien
- Runtime: 16 min
- Awards: N/A
- AKA: The Ghost of Slumber Mountain (United States of America) , The Ghost of Slumber Mountain , De geest der sluimerende bergen (Netherlands the) , De geest van de sluimerende bergen (Netherlands the) , Призрак Сонной горы (Russian Federation)
- Plot: A mountain climber has a dream in which he meets the ghost of an old hermit whose magic telescope lets him look back into prehistoric times including such dinosaurs as a brontosaurus and a diatryma as well as a death struggle between a triceratops and a T-rex.
- IMDB:tt0009105
The Ghost of Slumber Mountain Cast · · · ALL
Herbert M. Dawley
Uncle Jack Holmes (uncredited)
Willis H. O’Brien
Ghost of 'Mad Dick', the Hermit (uncredited)