AMP: 0 Location: St. Philip Rd and MT-7, Wibaux Cty No reassurance shield as S-413 begins. 413 is entirely unpaved. AMP: 5 Location: St Philip Rd and Carlyle N Rd, Wibaux Cty A couple miles later, S-413 will bear right to head south on Carlyle North Rd. AMP: 5 Location: Carlyle N Rd and St Philip Rd, Wibaux … Continue reading Montana Secondary Highway 413, MT-7 to S-336