In early 20th-century Montana, Col. William Ludlow lives on a ranch in the wilderness with his sons, Alfred, Tristan, and Samuel. Eventually, the unconventional but close-knit family are bound by loyalty, tested by war, and torn apart by love, as told over the course of several decades in this epic saga.
A gunfighting stranger comes to the small settlement of Lago. After gunning down three gunmen who tried to kill him, the townsfolk decide to hire the Stranger to hold off three outlaws who are on their way.
After the train station clerk is assaulted and left bound and gagged, then the departing train and its passengers robbed, a posse goes in hot pursuit of the fleeing bandits.
A group of young gunmen, led by Billy the Kid, become deputies to avenge the murder of the rancher who became their benefactor. But when Billy takes their authority too far, they become the hunted.
A renowned former army scout is hired by ranchers to hunt down rustlers but finds himself on trial for the murder of a boy when he carries out his job too well. Tom Horn finds that the simple skills he knows are of no help in dealing with the ambitions of ranchers and corrupt officials as progress marches over him and the old west.
Expert conman Joe Thanks teams up with half-breed Bill and naive Lucy to steal $300,000 from the Indian-hating Major Cabot. Their elaborate plan is full of disguises, double-crosses, and chases, but Joe always seems to know what he's doing.
Renegades trying to get the army to abandon their fort get the Indians addicted to whiskey, then convince them to attack and drive out the soldiers.
Stodge City is in the grip of the Rumpo Kid and his gang. Mistaken identity again takes a hand as a 'sanitary engineer' named Marshal P. Knutt is mistaken for a law marshal. Being the conscientious sort, Marshal tries to help the town get rid of Rumpo, and a showdown is inevitable. Marshal has two aids—revenge-seeking Annie Oakley and his sanitary expertise.
Bank robber Graham Dorsey spends a few hours with beautiful widow Amanda Starbuck, in which time his gang takes part in a disastrous holdup. Learning of his comrades' demise, Dorsey goes on the lam. Believing her short-term lover was killed by the law, Amanda decides to make the most of having had a liaison with the supposedly deceased desperado by writing a book about him. Much to his confusion, the still-living Dorsey watches as his name becomes legendary.
After serving a five year prison sentence for allowing his men to destroy a town in a drunken spree, a trail boss is hired by the same town's leading citizen to drive their cattle to Fort Clemson. Complicating matters, a rival cattle baron also hires the cattle driver to lead his herd.
Marshall "Big Jim" Cole turns in his badge and heads to Wyoming with his family in order to settle on some land left him by a relative. He faces opposition both from a neighbor who wants that land for his own sons, and from a grizzly bear nicknamed "Satan" who keeps killing Cole's livestock.
Rancher Reynolds has fired his men and hired killers and is now using a crooked land deal to put the other ranchers off their land. Calico finds the reason why when he runs into his old nemesis Porter.
A group of outlaws plan and execute a robbery in a small town. However, things go awry as the team attempt a getaway, when a couple of the locals attempting to follow them, are ambushed by marauding natives.
Two cowboys try to protect railroad workers from rampaging Indians.
An ex-con returns to his rural Ontario roots and outwits a corrupt and wealthy thoroughbred owner trying to take over a slew of local farms. Ray Dokes, a charming ex-ballplayer, returns from jail to discover the rural landscape of his childhood transformed by urban development. Determined to stay out of trouble, Ray heads to the farm of his old friend Pete Culpepper, a crusty Texas cowboy who trains losing racehorses and whose debts are growing faster than his corn.
Montana Rivers finally escapes her father who had forced her to wear men's clothing and help in robbing and cheating. She is taken in by friendly Indians and stays at their camp. Later, Akkomi, chief of the tribe, asks his friend Dan Overton to take the girl as it is not good for her to remain in the camp. Dan provides for "Tana" and falls in love with her but, because of her past, she keeps him at a distance. Jim Harris comes by and recognizes Tana as the boy robber, but when he attempts to blacken her past, Dan gives him a beating which paralyzes him. Jim then stays on with Dan, who regrets his hastiness. Eventually Tana's father appears and demands that Tana go away with him. She refuses but also does not tell Dan of this trouble.
With Silver City Raiders, perennial western sidekick Russell Hayden launched his own starring series. Hayden plays "Lucky", the same character he'd previously essayed in the Hopalong Cassidy films. This time around, Lucky tries to prove that crooked land baron Dawson (Paul Sutton) doesn't have prior claim on the entire territory. When legal methods prove only moderately effective, Lucky and his chums use more direct methods to drive Dawson and his ilk out of town.
Night riders are terrorizing homesteaders, and the town doctor tries to keep the locals from forming a vigilante group. After more towns people are killed, however, the rest of the town makes the doctor the town sheriff and tells him to clean up the gang.
Having quit their old gang and gone straight, Bert Allen and Joe Kemp finally own their own ranch after three years, but Joe robs the Riverton bank of the Green River Dam payroll - using Bert's horse, gun and gloves and leaving behind Bert's hat.
Rodeo contestants Johnny King and Corrigan meet, their fathers having been members of the Range Busters. When Johnny is knocked unconscious, time reverts to their father's era and the Range Busters are soon involved in the scheme to get Railroad right-of-way across Mother Slocum's ranch. When she is tricked into signing a release, the Range Busters find their job more difficult as the Sheriff is in with the crooks.