The Secret of Convict Lake is a 1951 American Western film directed by Michael Gordon and starring Glenn Ford, Gene Tierney, Ethel Barrymore and Zachary Scott.

The story is fiction, based on legends of Convict Lake, located in the Sierra Nevada mountain ranges of northern California.

The film opens with the narrator (Dale Robertson in an early, uncredited role) laying the foundation of the story.

The others—Canfield, Greer, Cockerell, Anderson and Maxwell—make it to Lake Monte Diablo, where eight women live in a settlement while their men are away prospecting.

Granny is the elder, watching over Marcia, Rachel, Barbara, Susan, Harriet, Mary, and Millie.

While Canfield and Marcia are away, Johnny Greer charms Rachel, Schaeffer's unmarried sister, into revealing where Granny hid the other guns.

Rudy Schaeffer spots a wanted poster, so the alarmed men race back to their families.

Canfield, riding back with Marcia, hears Barbara's cries and arrives in time to intervene.

However, just when Greer, Cockerell, and Anderson go to leave, Schaeffer and the other men arrive back in the small town and confront the convicts.

When the sheriff asks about the five fugitives (they found the frozen sixth man earlier), Granny shows him five newly-dug graves (the 4 convicts and Schaeffer).