Interstate 80 in California, Major interstate highway in northern California, US
Interstate 80 extends from San Francisco through Oakland and Sacramento before ascending the Sierra Nevada mountains to the Nevada border.
The highway officially opened on July 1, 1964, replacing US Route 40 and incorporating the San Francisco-Oakland Bay Bridge into its infrastructure.
The route connects ten California counties, linking urban centers, rural communities, and recreation destinations across the northern part of the state.
Travelers can obtain real-time road conditions and alerts by calling Caltrans at 1-800-427-7623 or checking their QuickMap service online.
At Donner Summit, the interstate reaches an elevation of 7,239 feet westbound and 7,227 feet eastbound, requiring frequent chain controls during winter.
Location: San Francisco
Location: Alameda County
Location: Contra Costa County
Location: Solano County
Location: Napa County
Location: Yolo County
Location: Sacramento County
Location: Placer County
Location: Nevada County
Location: Sierra County
Inception: July 1, 1964
Part of: Interstate 80
GPS coordinates: 39.31700,-120.61400
Latest update: May 26, 2025 19:48
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