Named for the Mexican soldier, Don Guillermo Castro, Castro Valley is an unincorporated area in Alameda County. It has developed into a bedroom community where workers live and commute to their jobs in the surrounding areas. A friendly peaceful town in the greater Bay Area, Castro Valley is nestled in a tranquil valley with rolling hills and lush landscapes and is conveniently located close to Interstate 580. The town offers many community activities, from local farmers' markets and festivals, to yearly car shows and concerts, visitors and residents alike delight in the easy-going astrosphere. Outdoor activities of all kinds are available in Castro Valley's rural setting that is known as the hub of California's recreational heartland. A wonderful place to visit or call home, Castro Valley is a destination for charming ambiance.