halloween displays (hayward / castro valley)

hello. it's 1 day away from oct! i am looking to see some great decor and displays. i go all out at my house and love to see other neighborhoods go all out. does anyone know if any cool areas were they are multiple houses and neighbors who do this? i love walking and seeing them at dusk. really brings the season alive!. any tips would be appreciated. anywhere in the east bay. from fremont to pinole . and all in between. even across the water i just want to see some cool stuff! thanks!