The crossword solutions for the term 'Valley in California' are Simi (4 letters), Napa (4 letters), and Silicon (7 letters). Simi Valley is a city located in Ventura County, California, and is part of the Greater Los Angeles Area. Napa Valley is a wine-producing region located in Northern California. Silicon Valley is a region in the southern San Francisco Bay Area of Northern California that is home to many of the world's largest technology companies.