Walnut Creek

Walnut Creek, city, Contra Costa county, northwestern California, U.S. It lies in the San Ramon Valley, east of both San Francisco and Oakland. Spanish explorers arrived in the region in the 1770s, and in the early 1800s the area became part of a Mexican land grant. The city, settled in 1849 during the Gold Rush (the first American settler was William Slusher, a squatter who built a home along what was called Nuts Creek), was...