APM: 105 Location: SR 1 and US 101, Mendocino Cty Immediately after SR 271, we’ll approach SR 1. America’s longest state highway comes to an end. APM: 105 Location: SR 1 and US 101, Mendocino Cty Follow 101 south to Ukiah and 101 north to Eureka.  S to SR 20  S to SR 271, N to SR … Continue reading California State Route 1, SR 271 to US-101