Filmed at Corriganville, actor Ray "Crash" Corrigan's movie ranch in Simi Valley, Sonora Stagecoach was the last of Monogram's eight ramshackle "Trail Blazers" Western. The series had already suffered the loss of veteran star
Ken Maynard -- who had become too difficult and costly -- and both
Hoot Gibson and
Bob Steele were nearing the end of their starring careers. This time, the "Trail Blazers," Gibson, Steele and Maynard's odd replacement,
Chief Thundercloud), are escorting prisoner
Rocky Camron (aka
Gene Alsace) to trial in Sonora. Sheriff Hampton (
Henry Hall) warns the three marshals that a gang of outlaws may attempt to assassinate Camron, whom the sheriff believes to be innocent. And sure enough, Blackie Reed (
Charles King) and his gang do their best to get to the prisoner, who is given a gun in order to defend himself. Rocky, as it appears, was framed for the murder of two deputies, a deed actually committed by Blackie on behalf of stagecoach office manager Paul Kenton (
Glenn Strange) and his banker brother, Joe (
Karl Hackett). With the help of
Betty Miles), Rocky's girlfriend and Weasel (Charles Murray, Jr.), a henchman turned state's evidence, the "Trail Blazers" clear Rocky of all charges and arrest both Blackie and his backers. Gibson and Steele went on to appear together in three additional Monogram Westerns --
Marked Trails,
Trigger Law and
Utah Kid (all 1944) -- but although they are often designated as "Trail Blazers" Westerns today, they were never produced or advertised as such. ~ Hans J. Wollstein, All Movie Guide