East Bay Walls, Ancient stone walls in San Francisco Bay Area, California.
The East Bay Walls consist of stone structures extending from short segments to half-mile lengths, built without mortar throughout the region.
Archaeological studies indicate these walls were constructed between 1850 and 1880, during the early American period of California settlement.
The walls represent a significant engineering achievement, combining materials from small rocks to massive boulders weighing over one ton.
Visitors can examine these structures at Ed R. Levin County Park in Santa Clara County and Mission Peak Regional Preserve in Alameda County.
The walls spread across multiple locations from the San Francisco Bay Area to northern regions like Chico, Red Bluff, and Montague.
GPS coordinates: 38.20560,-122.96600
Latest update: March 3, 2025 11:41
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