Route 66 Roy's History. Amboy crater as it is today. Picture is copyrighted, all rights reserved. Some 6000 years ago: Amboy crater was formed. Amboy crater became dormant after the sixth period of eruptions. Father Garces traveled over Indian paths from Needles towards Barstow and on to Los Angeles via Victorville and Cajon Pass. This would become a traditional route for pack trains carrying trade goods on an east-west route under the Spanish rule. On February 2nd, Mexico surrendered California to the control of the United States. On September 9th, 1850 (Admission Day) California was admitted in the Union. Lieutenant A.W. Whipple crossed the desert following ancient paths to explore a route for a railroad to be built across the Mojave. He followed the Mojave road that was laid over older...