Zachary Hallock and his son Joshua are farmers who live in a frontier town that suffers the assaults of a band of outlaws. After the murder of a Pinkerton's detective, the farmers decide to unite against the bandits, but Hallock rejects the proposal. To the astonishment of his son and his fiancée, Hallock decides to join the outlaws.
Trouble in Colorado is tying up Union troops needed back east during the Civil War and Lieut. Burke is sent to investigate. Macklin and his gang are causing the problems and Capt. Mason joins them. When Burke catches up with them he also finds Mason, his brother.
In Wyoming, mountain trapper Yancey goes to the nearest town to trade his pelts but gets into trouble when he tries to save runaway dance-hall girl Rosalie from her shameful job.
The Marshal sends John Weston to a rodeo to see if he can find out who is killing the rodeo riders who are about to win the prize money. Barton has organized the rodeo and plans to leave with all the prize money put up by the townspeople. When it appears that Weston will beat Barton's rider, he has his men prepare the same fate for him that befell the other riders.
Rodeo star John Scott and his gambler friend Kansas Charlie are wrongly accused of armed robbery. They leave town as fast as they can to go looking for their own suspects in Poker City.
When hired killer John Gant rides into Lordsburg, the town's folk become paranoid as each leading citizen has enemies capable of using the services of a professional killer for personal revenge.
Medicine show proprietor Doc Lattimer has in his possession a map showing the location of a cache of stolen gold. His son Don favors keeping the gold rather than returning it to the express company to which it rightfully belongs, and steals the map, only to find himself menaced by outlaw leader Cal and his gang.
When Hadley finds gold on his land, Kirby kills him and then goes after Hadley's ranch. After Eddie Dean foils Kirby's robbery attempt, Kirby forces the assistant land agent Tuttle to sell the ranch to him. But Eddie learns of the forgery thru Tuttle's boss and goes after Kirby.
The Carson City Kid and partner Laramie are outlaws. When his partner is caught the Kid, his identity being unknown, takes a job in Jessup's saloon. Here he see Jessup cheat Waren out of his money. Warren then robs Jessup posing as the Kid but gets caught. To gain his freedom, Laramie identifies Warren as the Kid. Realizing Jessup is the man that killed his brother, the Kid must find a way to clear Warren and get Jessup.
Chip has inherited a supposedly worthless gold mine from her father and Craig Allen is about to buy it. Roy suspects the mine may be valuable and using a clue left by Chip's father, investigates. He finds the hidden shaft that contains the gold and with the posse chasing him on a trumped up robbery charge, races to town with ore samples hoping to get there before the ownership is transferred.
Framed for murder and left for dead, a local legend comes back to make the guilty pay as he seeks revenge on those who killed his family, in this traditional Western about one man who stood against injustice.
Dawson is running rustled cattle across the abandoned Trenton ranch and has given it the reputation of a ghost ranch to keep people away. When Henty Tenton arrives from England to take over the ranch, Dawson tries to get rid of him. But Billy and Fuzzy are on hand to help Henry and it's not long before they have to go into action.
One of four western films made for PRC by bantam-weight Bob Steele, Ambush Trail stars Steele as cowpoke Curley Thompson. The villain of the piece intends to bankrupt all the local ranchers and grab up the surrounding property for himself. But with Curley involved, the bad guy and his minions don't have a chance. The screenplay, by D. W. Griffith alumnus Elmer Clifton, is a medley of western cliches, pausing every so often for a first-rate action sequence. Perennial sagebrush sidekick Sid Saylor provides negligible comedy relief.
Tobin is after the bandit Zanti who killed his parents. He finds him just as Zanti is about to kill Dusty and kidnap Ruby. Saving the two, he goes after Zanti. He catches him but Zanti escapes the Sheriff's handcuff's and this time Tobin has to chase him into the desert.
Kirby sends his henchmen to break killer Matt Brawley out of jail. But Brawley has already broken out and they return with Fuzzy instead. Realizing they think he's Brawley, Fuzzy plays the part. He and Bill plan to round up the gang but Fuzzy is in trouble when the real Brawley shows up to expose the hoax.
Billy Carson is accused of the crimes committed by his dead-ringer, outlaw cousin Jim Slade, and barely escapes a lynching. With the aid of his pal Fuzzy Jones, Billy catches up with his cousin and clears his own name.