The Tri Valley includes Dublin, Livermore and Pleasanton in Alameda County and Danville and San Ramon in Contra Costa County. The Tri-Valley is strategically positioned between the Inner East Bay and the Central Valley and is one of the fastest growing subareas, both in terms of population and employment growth. Corporations, like Safeway and Ross Stores, have favored the Tri-Valley for corporate headquarters because the Tri-Valley is a suitable place for lower-density campus-style offices that can accommodate many workers. High tech firms, especially those in computer technology and biomedical firms have also found this area to be increasingly attractive. The Tri-Valley also benefits from hosting two national laboratories – Lawrence Livermore National Laboratory and Sandia National Lab, that support highly innovative activities.

It is also home to Livermore Valley Wine Country, one of California’s oldest wine regions, playing a pivotal role in shaping California’s wine industry. Spanish missionaries planted the first wine grapes in the Livermore Valley in the 1760s.