The Tri-Valley area is grouping of three valleys in the

East Bay The East Bay is the eastern region of the San Francisco Bay Area and includes cities along the eastern shores of San Francisco Bay and San Pablo Bay. The region has grown to include inland communities in Alameda and Contra Costa counties. Wi ...

region of

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose. The Association of Bay Area Governments ...

. The three valleys are Amador Valley, Livermore Valley, and San Ramon Valley. The Tri-Valley encompasses the cities of

Dublin Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...

, Livermore, Pleasanton and San Ramon, the town of Danville, and the CDPs of Alamo, Blackhawk, Camino Tassajara, Diablo, and Norris Canyon. The area is known for its Mediterranean climate, wineries, and nature. It is primarily suburban in character. The total population of the Tri-Valley was 401,072 at the 2020 U.S. Census. It offers more affordable living accommodations than the cities of San Francisco and San Jose.

History

The

Ohlone The Ohlone ( ), formerly known as Costanoans (from Spanish meaning 'coast dweller'), are a Native Americans in the United States, Native American people of the Northern California coast. When Spanish explorers and missionaries arrived in the l ...

tribe settled the area circa 2000 BC, particularly in the northern part of Pleasanton. In AD 1772, however, Spanish settlers involved with the nearby mission work at Mission San Jose restructured the Ohlone way of life. The area began to be developed when the

Gold Rush A gold rush or gold fever is a discovery of gold—sometimes accompanied by other precious metals and rare-earth minerals—that brings an onrush of miners seeking their fortune. Major gold rushes took place in the 19th century in Australia, ...

ended. During this period, the area went from being marshland to agricultural.

Climate

The climate of the Tri-Valley is mild. Most rain falls in the winter. Snow almost never occurs, although it sometimes falls on the tops of surrounding mountains, especially Mt. Diablo. Summer days are in the 80s to over 100 °F, but nights are often cool. In winter, daytime temperatures reach the 50s and 60s, while nights are in the 30s and 40s, dipping on rare occasions into the 20s. Mean annual rainfall ranges from about in Livermore to in Alamo.

Transportation

The Tri-Valley is serviced by

WHEELS A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle bearing. The wheel is one of the key components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axl ...

, operated by the Livermore Amador Valley Transit Authority (LAVTA), a bus agency that operates local bus service throughout Livermore, Pleasanton and Dublin, including service to Hacienda Business Park,

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory (LLNL) is a Federally funded research and development centers, federally funded research and development center in Livermore, California, United States. Originally established in 1952, the laboratory now i ...

, Las Positas College, Stoneridge Mall, the West Dublin/Pleasanton BART Station and the Dublin/Pleasanton BART station. Two major highways, Interstates 580 and

680 __NOTOC__ Year 680 ( DCLXXX) was a leap year starting on Sunday of the Julian calendar. The denomination 680 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe f ...

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 Bay Area Rapid Transit (BART) is a rapid transit system serving the San Francisco Bay Area in California. BART serves List of Bay Area Rapid Transit stations, 50 stations along six routes and of track, including eBART, a spur line running t ...

, offering service to the rest of the

San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...

via 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. In 2018, BART cancelled plans to extend the line to Livermore. However, the Tri-Valley–San Joaquin Valley Regional Rail Authority is in the planning process for a rail connection between BART, ACE, and the San Joaquin Valley called the Valley Link. Tri-Valley-Offices

Economy

The Tri-Valley is home to the corporate headquarters of many companies, including 10X Genomics, 24 Hour Fitness,

Architectural Glass and Aluminum Architectural Glass and Aluminum (AGA) is a specialty glazing (window), glazing contractor located in the United States. Architectural Glass & Aluminum provides engineering, design, fabrication, installation, and assembly services for custom gla ...

, Bay Area News Group, Blackhawk Network Holdings, CallidusCloud, Chevron, The Cooper Companies, Discovery Toys, Ellie Mae, GE Digital,

Gillig Corporation Gillig (formerly Gillig Brothers) is an American designer and manufacturer of buses. The company headquarters, along with its manufacturing operations, is located in Livermore, California (in the East Bay region of the San Francisco Bay Area). ...

, Patelco Credit Union, Prosoft Engineering,

Ross Stores Ross Stores, Inc., operating under the brand name Ross Dress for Less, is an American chain of discount department stores headquartered in Dublin, California. It is the largest off-price retailer in the U.S.; as of July 2024, Ross operates 1, ...

, SafeAmerica Credit Union, Safeway, Shaklee, TriNet, Veeva Systems, Visioneer,

WANdisco Cirata plc. (formerly known as WANdisco plc.) develops technology that moves large Internet of things, Internet of Things (IoT) datasets, edge data, and Hadoop. The company is dual-headquartered in Sheffield, England and San Ramon, California. H ...

, The Wine Group, Product10x Accelerator, Salestable and Workday. Major employment centers include Bishop Ranch and Hacienda Business Park.

and

Sandia National Laboratories Sandia National Laboratories (SNL), also known as Sandia, is one of three research and development laboratories of the United States Department of Energy's National Nuclear Security Administration (NNSA). Headquartered in Kirtland Air Force B ...

are also major employers in the region. Schaefer Ranch Park

Recreation

The Tri-Valley features access to many recreational options, including Alviso Adobe Community Park, Blackhawk Museum, Brushy Peak Regional Preserve, Del Valle Regional Park, Dublin Hills Regional Park, Eugene O'Neill National Historic Site, Forest Home Farms, Iron Horse Regional Trail, Las Trampas Regional Wilderness, Little Hills Picnic Ranch, Livermore Valley Wine Country, Morgan Territory Regional Preserve, Mount Diablo State Park, Pleasanton Ridge Regional Park, Shadow Cliffs Regional Recreation Area and The Wave Waterpark.

References