The Tri-Valley, California region is a triangle-shaped area situated on the east side of San Francisco Bay about 18 miles southeast of Oakland and 33 miles from San Francisco. The Tri-Valley is comprised of three adjacent valleys – Amador, Livermore, and San Ramon – and is comprised of five communities that are members of the Tri-Valley CVB:  Pleasanton, Livermore, Dublin, San Ramon, and Danville. The Tri-Valley California area spans two California counties:  Alameda and Contra Costa. The population of the Tri-Valley region is about 300,000.

• Tri-Valley, California History
• Where is Tri-Valley, California?
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