Article 3. Speed Laws of California Vehicle Code >> Division 16.5. >> Chapter 5. >> Article 3.

No person shall drive an off-highway motor vehicle at a speed greater than is reasonable or prudent and in no event at a speed which endangers the safety of other persons or property.
The prima facie speed limit within 50 feet of any campground, campsite, or concentration of people or animals shall be 15 miles per hour unless changed as authorized by this code and, if so changed, only when signs have been erected giving notice thereof.