The Tri-Valley area is a triangle-shaped region of the eastern San Francisco Bay Area, 18 miles southeast of Oakland and 33 miles from San Francisco. It encompasses the cities of Pleasanton, Livermore, Dublin, San Ramon, and Danville.
The three valleys from which it takes its name are Amador Valley, Livermore Valley and San Ramon Valley. The region is well known for its Mediterranean climate, wine region, historic downtown areas, high cost of living and fine dining. It is a suburban area with a population of about 360,000. It is offers more affordable living accommodations than the cities of San Francisco and San Jose.
The area began to be developed when the Gold Rush ended. During this period, the area went from being marshland to agricultural.
Two major highways, Interstates 580 and 680 cross the Tri-Valley area. Interstate 580 runs east-west, connecting the area to the Central Valley to the east and the North Bay area to the west. Interstate 680 runs north-south, connecting the area to the South Bay area in the south, and the Concord-Walnut Creek area in the north. The two interstates cross on the border of Dublin and Pleasanton.
The Tri-Valley area is also serviced by BART, offering service to the rest of the San Francisco Bay Area with two stops: West Dublin/Pleasanton and the Dublin/Pleasanton terminus station. The West Dublin/Pleasanton Station opened in 2011, and was the first infill station on an existing line. BART plans include eventually extending the line to Livermore.
Content Courtesy of Wikipedia.org