Filoli, also known as the Bourn-Roth Estate, is a country house set in 16 acres of formal gardens surrounded by a 654-acre estate, located in Woodside, California, about 25 miles south of San Francisco, at the southern end of Crystal Springs Reservoir, on the eastern slope of the Santa Cruz Mountains. Now owned by the National Trust for Historic Preservation, Filoli is open to the public. The site is both a California Historical Landmark and listed on the National Register of Historic Places.