The Secret of Lost Valley
| MPAA Rating: | NR |
| Genre: | Short, Western |
| Country: | United States |
| Directed By: | James W. Horne |
| Written By: | Frederic R. Bechdolt |
| Cast: | Marin Sais |
| In Theaters: | May 05, 1917 |
| Runtime: | 20 minutes |
Followers: 0
| MPAA Rating: | NR |
| Genre: | Short, Western |
| Country: | United States |
| Directed By: | James W. Horne |
| Written By: | Frederic R. Bechdolt |
| Cast: | Marin Sais |
| In Theaters: | May 05, 1917 |
| Runtime: | 20 minutes |