Hayward is a city located in Alameda County, California in the East Bay subregion of the San Francisco Bay Area. With a population in 2014 of 149,392 Hayward is the sixth largest city in the Bay Area and the third largest in Alameda County. Wikipedia

Riverside is a city in Riverside County, California, United States, located in the Inland Empire metropolitan area. Riverside is the county seat of the eponymous county and named for its location beside the Santa Ana River. Wikipedia