I ran the Manastash Ridge Trail in my stock Jeep. We camped at Quartz Mt. Very cool area. We ran a couple trails where a lift would have been nice but you don't have to. Lots of easy FS roads and trails. Here is a link. Check out nwjeepn.com for more trail info.
http://www.nwjeepn.com/Maps/Manastash.JPG
http://www.nwjeepn.com/Maps/Manastash.JPG