Yes, it is private property. I used to go there all the time until I got a warning for trespassing. You won't catch me going back there anymore. I see plenty of people back there all the time because I pass it every day on my way to work but I'm not going to risk it. It's not worth it if you ask me. There's only a few good trails back there anyways.
i've been out there dozens of times. never knew this. any other good places (legal) in the area?