(CA-40-10) N. of Arroyo Grande, San Luis Obispo County, CA. CA227 (Branch St.) N. 7.5 miles from jct with US101 in Arroyo Grande to the turret on the W. side of the road at 6425 up a driveway 0.1 miles. (N35 12.286 W120 36.920) Photo by Mark & Clare Comstock 10-6-23.