The Trail to Durango by Larry Hill

Publisher’s summary
Will Cannon had gone to Durango a few years ago and taken care of the Silver Dollar Killer and the Edwards Gang, but now a new group of murderous outlaws are taking over Durango.

Will and his brother, Joe, do business in Durango, and he is not going to allow a gang of outlaws ruin his business there.

Will rides to Durango and later to the lawless mining camp of To Hell You Ride, Colorado, to fight the outlaws. He enlists the help of some miner vigilantes and some young cowboys and Pete Abrams and his other men from Chama to fight the outlaws.

The outlaws will soon regret confronting Will Cannon.