James Kincaid controls the local water supply and plans to do away with the other ranchers. Government agent Sandy Saunders arrives undercover to investigate Kincaid's land swindle scheme, and win the heart of one of his victims, Fay Denton.
Jim Warren is starting a range war by getting his boss Duke Bradley to fence off part of the range used by other ranchers. This pits father against son when Tom Bradley sides with a newly arrived nester family. Then after stealing Duke Bradley's money, Warren frames Duke's son Tom for the theft.
In Kentucky just after the Civil War, the Hayden-Colby feud leads to Jed Colby being sent to prison for 15 years for murder. The Haydens head for Nevada and when Colby gets out of prison he heads there also seeking revenge. The head of the Hayden family tries to avoid more killing but the inevitable showdown has to occur, complicated by Lynn Hayden and Ellen Colby's plans to marry.
Honest John is pulling off a swindle by buying cattle in Texas with worthless scrip and selling them in New Mexico for cash. Ken is leading the cattle drive not knowing that when they cross the state line Honest John's plan will have succeeded.
Based on a Zane Grey story, The Last Trail stars virile cowboy hero George O'Brien in a largely anti-heroic role. Escaping from a posse, the "good bad man" (O'Brien) boards an Eastbound train, where he strikes up a friendship with a genial gangster (J. Carroll Naish). Later on, the cowboy returns to the West as a member of the gangster's gang. He poses as the heir to a vast cattle ranch, never dreaming that he really is the heir. When the truth is revealed, the wayward cowboy switches to the side of the Law, while another of the gangster's flunkeys (Claire Trevor) reveals herself to be an honest newspaperwoman -- and thus a suitable candidate for romance.
Beasley, who is after Gayner's land, plans to kidnap his daughter. But Dale overhears their plan and kidnaps her himself. When Gayner arrives to retrieve his daughter, Beasley kills him and makes the Sheriff arrest Dale for the murder.
When his Ranger father is shot down and seriously wounded by rustlers, young Bob Baxter is given a Ranger's badge and a delivery to town of the rustlers.
A cowboy is hired to track down a gang of rustlers, but gets involved with a beautiful girl trying to run her grandfather's gold mine and other outlaws who are trying to stop her.
Money is mysteriously disappearing from a locked trunk atop the stage even though the trunk arrives still locked. When pals Bob Rivers and Grizzly get the jop driving the stage, the same thing happens.
A cowboy on the run from a posse finds the clothes and ID of a preacher on the trail. He assumes the man's identity, but when he arrives at the nearest town, he rides into the middle of a hanging--and the man who is being hanged knows his real identity.
An emergency at his Aunt's ranch gets Ed Randall leave from the Navy. He returns to find the water cut off and her note due the next day. When the man he seeks legal advice from is murdered, Ed is accused and he now finds himself in jail with a lynch mob forming outside.
Government man Fiddlin' has joined Wolf's gang and Banty has become his friend. When Fiddlin' objects to Wolf's kidnapping of Ann, he is left in a burning building. Rescued by his horse Tarzan, he convinces Banty to help bring in the gang.
A half a million dollars has been stolen and stashed away and prison inmate Dutch knows where it is. So Government Agent Joe goes to prison and makes friends with Dutch. When Joe breaks them out, Dutch leads them to the money only to find it gone. But Dutch's old gang is on hand and they haven't found it either.
In this Western, comprised of 12 chapters from a serial, Kit leads a group carrying a large gold shipment across the wild West. When the Mystery Riders attack and steal the gold, Kit is the only survivor. He later joins forces with the cavalry to retrieve it.
Randolph Graves, a high-pressure haberdashery salesman, is fired for arguing with a customer and gets job selling oil stock in a nearby town; there he falls in love with the sheriff's daughter and tangles with crooked stock promoters.
When Tad Wallace's act flops on Broadway, he joins a troop heading west. In a small town, they run into Jeffries who has just burned down the theater. When Jeffries kills Griswold, Tad has a plan to trap him by using the talents of Shakespearian actor Thorndyke.
Mysterious deaths have been occurring in the same towns as Miller's Circus and the Governor has sent Ken Kenton to investigate. Ken joins the show but when he realizes that Bargoff is involved, Bargoff has fled and taken Mary Hiller as a hostage. The trail leads to Baron Petroff who concocted the deadly chemical and Ken quickly finds himself the Baron's prisoner.