County Watsonville Municipal Airport (KWVI) in Watsonville, Santa Cruz County Notable historical airports Naval Air Station Alameda in Alameda, Alameda County (closed 1997) Alum Rock Airport in San Jose, Santa Clara County (closed approximately 1936) Crissy Field in the City and County of San Francisco (airfield closed 1974) Hamilton Air Force Base in Novato, Marin County (closed 1996) Santa Cruz Skypark in Scotts Valley, Santa Cruz County (closed 1983) Carmel Valley Airport in Carmel Valley, California (closed 2002) Former airports Antioch Airport in Antioch, California Fremont Airport (identifier Q59) in Fremont, California Montgomery Field / Marina Airfield, now called Marina Green (Airmail Facility), San Francisco, California, formerly named after aviation pioneer John Joseph Montgomery Sky Sailing Gliderport in Fremont California Vacaville Airport/Vacaville Gliderport, in Vacaville, California See also List of airports in California List of airports of Santa Cruz County, California San Francisco Bay Area Airports