APM: 100 Location: Rosewarne Rd and US 101, Mendocino Cty No reassurance shield as this short unrelinquished portion of US 101 begins. APM: 99 Location: Rosewarne Rd and SR 101, Mendocino Cty The unrelinquished portion ends at the Rosewarne Rd intersection, with the old alignment of US 101 visible in the distance.  S to SR 1, N … Continue reading California State Route 101 Unrelinquished, US-101 to Rosewarne Rd