Johnson Valley is near Barstow, California and is the perfect place for ATV enthusiasts. It is especially set up for off road riding. The terrain has a great variety of grades and landscape material to test your prowess and ability to handle your equipment.
An ATV driver can jump off at Old Woman Springs Road or Camp Rock Road from highway 247 to enter this area. These are dirt roads, and a bunch of competitive events are centered around Anderson Dry Lake and Soggy Dry Lake near Camp Rock Road. This is a very user friendly ATV area. The regulations and rules are basic to any outdoor recreational area, common sense (you are not allowed to burn any wood with nails in it for fires - a duh moment, considering all the tires in the vicinity), and courtesy (don't bother the wildlife, or trash the area.)
Camping is fine, as long as no one is blocking any road in a riding area with their camp; common sense again. The biggest bit of common sense an ATV driver should follow is the warning at the eastern boundary of Johnson Valley, DO NOT ENTER. No ATVer will want to wander onto Twenty-Nine Palms Marine Air-Ground Combat Center, where in all likelihood you could be hurt by the firing range practitioners or at the very least, arrested for trespassing.
Any ATVer will love the chance to drive rolling hills, unfettered valleys, dry lake beds, sandy washes, and steep climbs up mountains. Just about every condition an ATV driver will ever experience is here, just waiting around every turn in the ATV trail.