The Old Spanish Trail was a 1200-mile historic pack trail from Santa Fe to Los Angeles, used by Native Americans, explorers, trappers, immigrants, and Mexican traders who brought woolen goods from New Mexico in exchange for highly prized California mules and horses. In active use between 1829 and 1848, the portion passing through San Dimas became known as the “Upper San Bernardino Road” and was later used by wagons and stagecoaches. Congress designated the routes as the Old Spanish National Historic Trail in 2002.