AMP: 82 Location: Huffine Ln and Gallatin Rd, Four Corners, Gallatin Cty Reassurance shield after the 84/85 junction AMP: 85 Location: Huffine Ln and Cottonwood Rd, Gallatin Cty A couple miles east, and we’ll approach S-345 AMP: 85 Location: Huffine Ln and Cottonwood Rd, Gallatin Cty Turn right for S-345, which heads south, east, and then back north … Continue reading U.S. Route 191, MT-84/MT-85 to S-345