The Pony Express ran between what two U.S. states?
New York and CaliforniaNew York and California
10%Missouri and CaliforniaMissouri and California
78%Philadelphia and ColoradoPhiladelphia and Colorado
6%Boston and WashingtonBoston and Washington
6%In the early 19th century, mail delivery to the West Coast of the United States was inefficient, expensive, and unreliable — not to mention difficult and even dangerous. Enter: the Pony Express, a system that used horse-and-rider relays to cover hundreds of miles in a matter of days. The route started in St. Joseph, Missouri, and ended in Sacramento, California, with relay stations at various points along the way.
Source: Pony Express National Museum