The Secret of Black Mountain
| MPAA Rating: | NR |
| Genre: | Short, Western |
| Country: | United States |
| Directed By: | Otto Hoffman |
| Written By: | Jackson Gregory |
| Cast: | Jack McLaughlin, Charles Dudley, Frank Austin, H.C. Russell, J.B. Warner, Louis King, Vola Vale, Gibson Gowland, Philo McCullough, Henry Crawford, Mignon Le Brun |
| In Theaters: | Sep 21, 1917 |
| Runtime: | 40 minutes |
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