Flaming Frontiers (1938)

"INDIAN SCOUTS! COVERED WAGON ATTACKS! TRAIL BLAZING RIDERS! POWDER BLASTING FIENDS! SCALP-HUNTING BRAVES! PIONEER SHARPSHOOTERS! SPEEDING THE PONY EXPRESS! AMBUSHING RAIDERS!"

Tom Grant has found a rich gold vein and Bart Eaton is after it. Tom's sister Mary heads for the gold fields and Eaton and his men follow. Eaton teams up with Ace Daggett who plans to doublecross him and get the gold for himself. They frame Tom for murder and then try to get him to sign over his claim. The famous scout Tex Houston is on hand, escaping the attempts on his life, saving Mary from various perils, and trying to bring in the real killer and clear Tom.