AMP: 53 Location: US-89 and S-427, Cascade Cty Reassurance shield after the 427 junction. AMP: 49 Location: US-89 and Hughesville Rd, Monarch, Cascade Cty A couple miles later, we’ll enter unincorporated Monarch. AMP: 49 Location: US-89 and Hughesville Rd, Cascade Cty As we head out of Monarch, turn left for NF-120/Hughesville Rd. AMP: 49 Location: US-89 and Hughesville Rd, … Continue reading U.S. Route 89, S-427 to S-259