NPS Number: 66000204
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.
Registration Date: 6/1/1932
Cedar Pass, State Hwy 299 (P.M. 51.3), 6.2 mi W of Cedarville
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