Hayward Park, the 1880 American Queen Anne-style residence of Alvinza Hayward (often said to be "California's first millionaire" from his silver and banking fortunes), was built on an 800 acres estate in San Mateo which included a deer park and racetrack, roughly bounded by present-day El Camino Real (on the west), 9th Avenue (on the north), B Street (on the east) and 16th Avenue (on the south).