Mackenna's Gold (1969)

Watch Mackenna's Gold: The gangster Colorado kidnaps Marshal McKenna. He believes that McKenna has seen a map which leads to a rich vein of gold in the mountains and forces him to show him the way. But they're not the only ones who are after the gold, soon they meet a group of "honorable" citizens and the cavalry crosses their way too, and that is even before they enter Indian territory.