Despite his unprepossessing screen personality, singing cowboy Jimmy Wakely was starred in a series of Monogram westerns, one of which was West of the Alamo. Wakely and comedy sidekick Lee "Lasses" White play a pair of government agents who work undercover to solve a series of baffling crimes. It comes to no one's surprise that the criminal mastermind is the town's leading citizen, in this case banker Clay Bradford (Jack Ingram). As was typical in the Wakely westerns, West of the Alamo is approximately 25 percent action and 75 percent musical. Among the guest warblers this time out is the Arthur Smith Trio, headed by a gospel singer who'd later emcee a popular religious TV talk show.
The Sheriff shoots the robber of the Bank and recovers the money bag only to find it empty. Ranger Tim Barlow arrives and takes over the investigation.
Forest Ranger Tom Corbin patrols the lumber grant of the McFarland and Williams Lumber Company, party owned by Dale McFarland. Tom discovers that Bart Williams is systematically cutting excess timber and falsifying his timber reports to the government. Williams is assisted by "Bull" Riley, who, suspecting that Tom has discovered their thievery, gives Tom a beating in an unfair fight.
Swifty is framed for the murder of Alec MeNiel by the Lawyer Cheevers and the stepson Price. Then they incite the locals to form a lynch mob, but Swifty has an unexpected ally in the Sheriff who knows Price was after his stepfather's land.
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.
A cowpuncher is out for revenge on the gent who seduced his sister into a dance hall by advertising for a school teacher and then finished her off before he blew town. Rex the Dog and Starlight the Horse do their part in Jack Perrin's victory over the villain and his assistant.
Federal agent Steve Lawton works undercover with his assistant, Smiley Burnette, to track down an outlaw gang that is raiding government gold shipments bound for Fort Navajo.
In this western, a sheriff attempts to exact his revenge against the desperadoes who cost him his job. The former lawman successfully gets rid of the bad hombres and clears his name.
When the bank is robbed, Gene and the boys are singing nearby and the Chief arrests them as gang members but lets them go thinking they will lead them to the others.