Of course, there are so many that there is no way I can list them all, so below you'll find a select group of pumpkin patches, amusement parks, haunts and film festivals for you to explore.
Got recommendations? Add 'em in the comments below!
My go-to pumpkin patch is Tanaka Farms (it's a fully functional farm and you can pick pumpkins still on the vine!), but this year I might visit a few others. I hear that for families with kids the Irvine Park Railroad patch is pretty awesome...so if you live in the OC and have kids, take them there! That way they'll be out of my hair at the Tanaka Farms patch! Another one I hear is pretty cool is the one in Woodland Hills...they even have a small "Fright Fare" at night!
Irvine, CA September 23rd - October 31st, 2010
Orange, CA - September 18 - October 31, 2010
Woodland Hills, CA - September 24th - October 31st, 2010
All of the parks in SoCal go all out for Halloween. Closest to me are the Disneyland and Knott's Parks, which are always a blast! Disneyland is more kid-friendly, as is Legoland, but if you are looking for scares definitely check out Knott's and Universal Studios. They do a great job on their mazes and their spooks will scare you silly!
Anaheim, CA - September 17th - October 31, 2010
Buena Park, CA - select dates starting September 24th through October 31st, 2010
Universal City, CA - September 24th - October 31st, 2010
Valencia, CA - weekends October 8th - 31st, 2010
Carlsbad, CA - every weekend in October
There are a TON of yard haunts, neighborhood haunts, etc., so I obviously can't list them all. The ones below I've never been to, but I desperately want to go to ALL of them! The Haunted Hotel is legendary, the creepy Queen Mary is the perfect place for an eerie evening and The Empty Grave looks pretty cool for a smaller haunt.
San Diego, CA - September 24th - October 31st, 2010
Anaheim, CA - September 24th - October 31st, 2010
Long Beach, CA - select dates October 1st - 31st, 2010
Looking for some awesome horror flicks to watch in October? Look no further than these two great festivals, showcasing the best in independent horror!
Los Angeles, CA - September 30th - October 3rd, 2010
Los Angeles, CA - October 8th - 17th, 2010