SCOTTSBLUFF, Neb. (AP) — The annual revival of the Pony Express has been chosen as the official event to celebrate Nebraska’s 150th birthday.

More than 700 riders began the mail service trip by horse in Missouri on Monday, the Scottsbluff Star-Herald reported. They’ll travel nearly 2,000 miles via the Pony Express National Historic Trail through Missouri, Kansas, Nebraska, Colorado Wyoming, Utah, Nevada and California by June 15.

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