AMP: 1 Location: Reserve Hwy and MT-16, Sheridan Cty Reassurance shield as S-258 begins. AMP: 1 Location: Reserve Hwy and MT-16, Sheridan Cty Control state action! AMP: 13 Location: Reserve Hwy and Dagmar Rd, Sheridan Cty Several miles later, we’ll approach S-516 just north of Dagmar. AMP: 13 Location: Reserve Hwy and Dagmar Rd, Sheridan Cty Turn … Continue reading Montana Secondary Highway 258, MT-16 to S-516