The term 'LOS ___, CALIF.' is completed by two crossword solutions: ALTOS and GATOS. Los Altos is a city in Santa Clara County, California, located in the San Francisco Bay Area. It is known for its affluence and high quality of life. Los Gatos is a town in Santa Clara County, California, also located in the San Francisco Bay Area. It is known for its small-town charm and its proximity to Silicon Valley.