NO. 15 BONNER GRADE - The first road from Cedarville to Alturas followed the course of the present highway over Warner Mountains from Surprise Valley. It was named in honor of John H. Bonner, who was instrumental in securing the construction of the road over Bonner Grade in 1869.
Cedar Pass, State Hwy 299 (P.M. 51.3), 6.2 mi W of Cedarville
We found a marker whose plaque is missing. I wonder what it commemorated?