AMP: 28 Location: SR-23 and SR-61, Cornish No reassurance shield after SR-61. AMP: 28 Location: SR-23 and 5600 S, Cornish SR-23 ends as the highway crosses into Idaho. AMP: 28 Location: SR-23 and 5600 S, Cornish Welcome to Idaho! The highway continues as a local road up to Idaho SH-36, which connects to I-15 and Pocatello. S to … Continue reading Utah State Route 23, SR-61 to ID State Line