Sierra Baron is a 1958 American Western CinemaScope color film directed by James B. Clark and starring Brian Keith, Rick Jason and Rita Gam, from the novel by Thomas W. Blackburn.

In 1848, a rancher, Miguel Delmonte tries to protect his Princessa Spanish land grant, from American landgrabbers after his father is killed.

Real estate agent Rufus Bynum, hires a Texas gunfighter Jack McCracken to kill the man.

André de Toth and John Hawkins wrote a script with De Toth intending to direct; the Skouras brothers wanted Gregory Peck and Jack Palance to star.

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