Where to trail run in So Cal?

I just finished up college and Im about to move to LA this spring from SC for an internship. I absolutely love and need some trails. I was hoping to get some suggestions of good places to experience some awesome trails. I have no problem traveling a couple hours to place for weekend trips so I'm open to all suggestions. also if anyone is interested in a running partner let me

Okay, sorry for the very late reply but I just joined. I grew up in SoCal and spent a ton of time running trails from the Mexican border to the northern aspect of the Sierra Nevada. From the LA area I would recommend the Angeles National Forest. The Pacific Crest Trail (PCT) follows the crest of the mountains from Big Bear to Aqua Dulce. You can find the PCT and other great trails off of the Angeles Crest Hwy (State Hwy 2) wich starts in Santa Monica and takes you through the LA basin and over the mountains to the Mojave. Plenty of nice peaks (Mt. Baden Powell) if you are into that sort of thing. Have fun.