AMP: 0 Location: US-287 and MT-87, Madison Cty Reassurance shield after 87. 287 gets new mileposts at this junction, and they’ll increase to US 191. AMP: 22 Location: US-287 and US-191, Gallatin Cty We’ll travel through several miles of mountains before arriving at US 191 twenty-two miles later. AMP: 22 Location: US-287 and US-191, Gallatin Cty Turn right … Continue reading U.S. Route 287, MT-87 to US-191