AMP: 0 Location: MT-80 and US-87, Chouteau Cty Reassurance shield as Montana 80 begins and we drive down to Fort Benton. AMP: 1 Location: US-87 and S-387, Chouteau Cty As we enter Fort Benton, we’ll come to a junction with S-387. AMP: 1 Location: US-87 and S-387, Chouteau Cty Turn left for S-387. 387 is the original alignment … Continue reading Montana Highway 80, US-87/S-223 to S-387