Here's another I used to run all the time, lots of bears, they actually shut it down but I hear rumors and found a couple of short videos that people have been able to wheel there in the last couple of years. They shut it down in 2008 and made it a bear preserve. I used to ride mountain bikes here as well, got chased by a bear once, thank God I was heading down hill.
It is a really cool trail that branches out, you can do a short loop or long loop. The long loop is 22miles or so the short loop is around 12.