AMP: 23 Location: US 89 and S-408, Teton Cty Reassurance shield as we head out of Fairfield AMP: 23 Location: US 89 and S-408, Teton Cty 23 miles to I-15 AMP: 20 Location: US 89 and S-431, Teton Cty A few miles later, we’ll approach secondaries 431 and 565 AMP: 20 Location: US 89 and … Continue reading U.S. Route 89, S-408 to S-431/S-565