The Hashknife Pony Express makes its ride every January traveling 200 miles from Holbrook to Scottsdale, Arizona, and delivering 20,000 first-class letters by horseback. The ride is led by the Navajo County Hashknife Sheriff's Posse. More than two dozen riders in authentic cowboy clothing carry the mail, relaying the bags along the route. The arrival of the Hashknife Pony Express in Scottsdale kicks off the annual Parada del Sol.