AMP: 129 Location: US-12 and 1st St, Golden Valley Cty Reassurance shield after 238 and 300 as we head out of Ryegate. AMP: 146 Location: US-12 and MT-3, Golden Valley Cty 17 miles later, we’ll approach the Montana 3 split. AMP: 146 Location: US-12 and MT-3, Golden Valley Cty Follow 3 into Lavina and then … Continue reading U.S. Route 12, S-238/S-300 to MT-3