The Stalking Moon is a 1968 American Western film in Technicolor directed by Robert Mulligan and starring Gregory Peck and Eva Marie Saint.

Sam Varner (Gregory Peck) is a scout retiring from the Army to his ranch in New Mexico.

He agrees to escort Sarah Carver (Eva Marie Saint) and her son after she begs him.

When they return to the station, everyone there is dead, killed by the boy's Indian warrior father, Salvaje (played by Nathaniel Narcisco).

When the stagecoach does arrive, Sam puts Sarah and her son on it and follows them to a rail station called Silverton.

The two men fight and eventually Sam shoots Salvaje three times as the warrior falls atop him, dying.

The film marked the reunion between director Robert Mulligan, producer Alan J. Pakula and actor Gregory Peck, six years after their collaboration on To Kill a Mockingbird.

Vincent Canby of The New York Times wrote "There are some lovely individual things in The Stalking Moon—broad, Western landscapes, a moment in which Miss Saint suddenly catches her haggard look reflected in a train window, a scene in which Peck buys a railroad ticket at a desert crossing that explains the awful, dislocating distances on the frontier.

Those, however, are random touches...Like Peck, the film moves stolidly forward with more dignity than excitement...Quite consciously, Mulligan and Alvin Sargent, who wrote the screenplay, have kept their focus on the poor whites, but unfortunately, none of them is especially interesting.