History Danger Zone 1920 to 2021

The primary access to Mount Diablo State Park is Mount Diablo Scenic Boulevard, a small, narrow, old road that is deadly dangerous.  Since 1931 California State Parks has had an easement over this private road so as to provide access for park visitors.  Their easement includes a half-mile narrow and twisting section of Scenic we call “The Danger Zone,” where a cyclist was killed in 2019 and multiple near-misses occur on a daily basis.

California State Parks has no plan to address the safety of The Danger Zone for their visitors and, in fact, has been quietly obstructionist to all efforts to improve the situation. Don't take our word for it: Read the History  

Then, please, send in any additional information, emails, documents, surveys, photos, videos, and suggestions.  We look forward to hearing from you and to making The Danger Zone on Scenic safer for park visitors and all users of the road!

DANGER ZONE MAP (3:25:2021)
1923-ESTABLISH-MOUNT-DIABO-PARK

1923 “PUT MT. DIABLO INTO A STATE PARK”

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2011 DIRECTOR PUBLIC WORKS DEPARTMENT & LAFCO “MEETING NOTES”

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2009 “SAVE MT. DIABLO REPAIR AND MAINTENANCE PROJECT”

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2009 “SAVE MT. DIABLO & DIRECTOR PUBLIC WORKS DEPARTMENT TRAFFIC COUNTS”

CAR-RACE-TO-THE-SUMMIT

1924 “AUTO RACE TO DIABLO’S SUMMIT”

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2002 PUBLIC WORKS DEPARTMENT “24 HOUR TRAFFIC VOLUMES”

Fil UY, Senior Engineering Technician Public Works Department, Contra Costa County

BIKE DANVILLE

1978 DIRECTOR PUBLIC WORKS DEPARTMENT “REVISED ALIGNMENT MAP”

BIKE DANVILLE

1978 STAKEHOLDERS MEETING

BIKE DANVILLE

1978 CA STATE PARKS UPGRADE ROAD $150,000

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1975 FIRST STAKEHOLDERS MEETING