AMP: 0 Location: 1st St and Main St, Alder, Madison Cty No reassurance shield as 357 begins in Alder. AMP: 0 Location: S-357 and Virginia St, Madison Cty Reassurance shield as we head out of Alder. AMP: 11 Location: S-357 and Idaho Creek Rd, Madison Cty 11 miles later, we’ll pass by the Ruby River … Continue reading Montana Secondary Highway 357, MT-287 to NF-100