Local SVRAs are a good start, though I wouldn't recommend for lowered cars.

My little spot is a tiny little spot at the county line between San Mateo County and Santa Clara County. On Skyline Blvd (AKA California State Route 35), where the small trail entrances are. The west side (southbound side) has a deep puddle build up during the rainy season, so it's just enough to actually put some mud on your paint.
Be careful though, it is a very small spot. I'd only recommend if you just want to get a little muddy/dirty, otherwise, no sideways action there.

 

Haha I really don't remember now...it was 4+ years ago...ill google map when I get some free time

 

It may be a drive for you guys, but i go into the farm roads in salinas, there usually are some big mud parking lots that get your car filthy!

 

It's probably a good idea to be careful in any event. I have had loads of fun doing this but mostly in Hawaii (Big Island, cane fields) and England (Tank Crossings, OMFG). If you hit a big enough puddle going too fast, you can rip your bumper cover clean off. It's only funny for a few minutes.

This was my Mondeo when I lived in the UK:



Also Hollister is really fun, but there's people out there so just don't get too silly.

It's also a blast to enter a rally. RallyX FTW!!!!

Here's my '91 Justy at Prairie City:

 

ill scout for some places in morgan hill over the weekend, i wish my parents land had easy access to it.

 

I'm down to be part of this lol there's some nice open spots here in Watsonville. You just gotta know where to look..let me know when u guys plan on getting together.

 

if your in the forest hill area check out: Gorman Ranch Road.

 

rainy day bump. ive scouted a couple potential private lots that i want to ask the owners if they mind if i loosen up their dirt a bit

 

i was having fun in a parking lot today

 

Let us know if you find anything.

I was thinking of hitting up a farmer to make him a little extra cash in the off season.

 

bump!

 

I've seen some people do donuts at Newark memorial highschool's football field before. Poor kids.