Dr. Hartman talks about his volunteering on horseback including the Re-Ride.

… horseback-related event that he looks forward to every year is the annual Pony Express Re-Ride. Held every May, the re-ride celebrates and remembers the brave Pony Express riders who risked — and often lost — their lives to deliver the mail during the 18 months of its existence from April 1860 through October 1861.

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