AMP: 43 Location: US-87 and Old Hwy 87, Fergus Cty Reassurance shield after the 200 split as we head out of the Grass Range area AMP: 21 Location: US-87 and S-244, Musselshell Cty As we enter Mussellshell County after briefly grazing the southwest corner of Petroleum County, we’ll approach S-244 AMP: 20 Location: US 87 … Continue reading U.S. Route 87, MT-19/MT-200 to S-244