The Shasta Cascade Region offers an abundance of prime backpacking and hiking areas. Just check any map of the Northstate and virtually anywhere you look is going to be public lands or close to public land. The eight National Forests and numerous wilderness areas in the Shasta Cascade Region all offer fantastic trails. Besides going out on your own, there are several reputable guide services in the Shasta Cascade Region. These can provide a once-in-a-lifetime family experience using either horses or llamas for carrying those camping essentials, or take the avid fisherman or hunter to a remote locale they would never find on their own.
For specific information about public lands, review the public lands pages on this site and contact those agencies which manage the area you are considering for your back country experience. Remember to pack your camera, a few snacks, and plenty of water, and as always, tread lightly!