Final answer:
Stagecoach Pass had been running as a transportation route before the completion of the railroad in 1869, enabling faster travel to the western United States.
Step-by-step explanation:
Stagecoach Pass had been running for an unknown period of time. The text provided does not mention the exact duration of its operation. However, Stagecoach Pass was a transportation route used before the completion of the railroad in 1869, which significantly improved travel to the western United States. Before the railroad, journeys to the western United States took many months. Stagecoach Pass allowed faster travel for individuals using horse- or oxen-drawn wagons.
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