What California ATV Laws Require
California ATV laws require every rider on public lands to wear a helmet, bar most passengers and set training and supervision rules for anyone under 18. The vehicle also needs a DMV off-highway identification plate. These rules come mostly from Division 16.5 of the Vehicle Code. Private land and public riding areas can differ, so the location shapes which rules apply.
Helmets on Every Rider
Vehicle Code section 38505 says no one may operate or ride an ATV on public lands without a helmet, and the rule also covers anyone towed or carried by one. The helmet must meet the standards for motorcycles and motorized bicycles. The State Parks ATV safety page quotes the rule. For helmet standards in general, see California helmet laws.
Passenger Limits in California ATV Laws
Section 38506 generally bars carrying a passenger on an ATV on public lands. There is one exception. An ATV designed for an operator and no more than one passenger may carry that passenger. Check the manufacturer’s design and labels before letting anyone ride along.
Many ATVs carry warning labels about passengers near the seat or fenders. Read them closely before each season. A long seat does not by itself mean the maker designed the machine for two people, so rely on the manufacturer’s statement. If in doubt, ride alone and bring a second machine for the other person.
Riders Under 18
Section 38503 sets conditions for operators under 18 on public lands. The young rider must meet one of three conditions. First, the rider may take a safety course under a certified instructor.
Second, the rider may ride under the direct supervision of an adult who holds an ATV safety certificate. Third, the rider may hold a safety certificate personally.
State Parks says its off-highway division funds ATV safety certificate training for ages 6 through 17. The page lists the ATV Safety Institute as the contact for signing up.
Riders Under 14
Children under 14 face an added rule. Under section 38504, they must meet one of the section 38503 conditions. In addition, a parent, a guardian or an adult the parent authorizes must accompany and directly supervise them. The State Parks page on minors and ATVs sets out the text.
Section 38504.1 also bars a parent or supervising adult from knowingly allowing a child under 14 to ride in violation of that rule. A first conviction can bring a fine or an order to complete a safety course.
Registration Under California ATV Laws
The DMV off-highway vehicle page explains that OHVs display a DMV identification plate. A new plate comes every two years with renewal. Plates come in green or red depending on the manufacturing date and emissions compliance.
Plate color can affect when and where the vehicle may ride. Check current riding season rules for red plate vehicles before a trip.
No Street Use for ATVs
According to the DMV, ATVs do not meet federal standards for on-highway use, and owners cannot convert them. So an ATV generally cannot become street legal by adding lights or mirrors. Treat any road as off limits unless an official source for that area says otherwise.
ATVs Versus Other Vehicles
ATVs differ from recreational off-highway vehicles, often called side by sides. They also differ from road legal motorcycles. Each category has its own definitions and rules in the Vehicle Code. A dirt bike with highway registration follows motorcycle law on the street.
For motorcycle licensing, see California motorcycle permit restrictions. Check the vehicle’s specifications rather than a dealer’s label.
Where California ATV Laws Apply
Many of these rules apply on public lands. That includes state vehicular recreation areas and other public riding areas. Private land may follow different rules, though owners and parents still face general safety duties.
Local ordinances can also restrict riding near homes. Always confirm the rules for a specific area before unloading.
Planning a Safe Ride
- Check the helmet fits and meets the standard
- Confirm the plate is current
- Bring safety certificates for young riders
- Review area maps and closures
- Tell someone the route and return time
Good planning reduces risk. Also, many riding areas post their own rules at the entrance, such as speed limits near camping areas. Read those signs on arrival, since they can add to the state rules.
Rangers in state riding areas can answer questions about closures and trail difficulty. Meanwhile, parents should match each child to a machine sized for that child, following the manufacturer’s age labels. It also helps show careful conduct if an incident ever leads to questions later.
Equipment and Defects
Mechanical problems sometimes cause crashes. Keep maintenance records and recall notices. Before each ride, check the brakes, throttle, tires and lights. Write down any repair done by a shop, with the date and the work performed.
Those habits help keep the machine safe. They also create a record if anyone later asks how the vehicle performed. If a defect may have played a role, see California product injury claims.
This article is general information, not legal advice. Laws change and every situation is different.