AMP: 189 Location: SH-75 and SH-21, Custer Cty Reassurance shield after SH-21 as we head out of Stanley AMP: 184 Location: SH-75 and NF-222, Custer Cty Reassurance shield after Forest Road 222 AMP: 181 Location: SH-75 and Local Rd, Custer Cty Reassurance shield after a random turnoff a few miles later. AMP: 178 Location: SH-75 and Obsidian Rd, Obsidian, … Continue reading Idaho State Highway 75, SH-21 to US-20