AMP: 465 Location: US-89 and SR 64, Coconino Cty Reassurance shield after the 64 junction AMP: 457 Location: US-89 and BIA 6150, Gray Mountain, Coconino Cty 8 miles later, we’ll approach Gray Mountain AMP: 456 Location: US-89 and BIA 6150, Coconino Cty Reassurance shield as we  head out of Gray Mountain AMP: 456 Location: US-89 … Continue reading U.S. Route 89, SR 64 to I-40 Bus/US-180