Guide to Mammoth Snow Chain Requirements

In Mammoth Lakes, winter stoke is always high, for good reason! But remember—this merry season of snowy slopes also brings winter driving conditions.

Carry chains, understand how to use them, know the restriction codes (R1, R2, R3), keep updated on road conditions and chain up safely, *not* in the middle of the road. Mammoth Lakes receives some of the heaviest snowfalls anywhere in California. But day after day, no matter how powerful the storms are, we count on our snow removal crews to efficiently return our streets to drivable condition. During the winter, these crews works diligently to keep Mammoth Lakes roads clear to ensure smoother travel for our residents and visitors. You can help Mammoth Lakes create and maintain safer driving conditions by following some simple rules for being a snow smart driver.

When to Use

Restrictions

Tips

How to Install

Where to Buy

When Do You Need Snow Chains In Mammoth Lakes?

Vehicles traveling in the Eastern Sierra during winter months need to carry chains at all times, and when winter conditions hit, make sure you already know who to use them. If you've never used them before you should practice at home so that when the time comes, you are already a pro at chaining up.

How do you know when you are required to use your snow chains? CalTrans and law enforcement will put signage up to indicate the different restriction levels on a particular road or highway. The Caltrans website is a great resource for quick, up-to-date road conditions. You can utilize their QuickMap App throughout the state to monitor road conditions and chain restrictions in real time. Make sure you know which restriction level your vehicle falls into, and plan to use your snow chains when that level is indicated.

Snow Chain Restriction Levels

R1 – Chains are required on all vehicles except passenger vehicles and light-duty trucks under 6,000 pounds gross weight and equipped with snow tires on at least two drive wheels. Chains still must be carried by vehicles using snow tires. All vehicles towing trailers must have chains on one drive axle. Trailers with brakes must have chains on at least one axle.
R2 – Chains or traction devices are required on all vehicles except four-wheel or all-wheel-drive vehicles with snow tires on all four wheels.
R3 – Chains or traction devices are required on all vehicles, no exceptions.

More Snow Chain Tips & Information

Conditions can change quickly during winter storms, which means even if your vehicle isn't required to use chains at the current restriction level, you may need them moments later on the same road. Law enforcement may set up checkpoints to ensure vehicles are carrying chains (even if the regulation level does not call for chains for your vehicle yet). If you do not have your chains with you, you will not be able to continue your trip.

Once chain restrictions are placed on a road, the speed limit will also drop to 25 to 30 mph. Changes in speed limit will be posted on roads and highways along with the snow chain restriction information.

How to Install Snow Chains on Your Vehicle

Knowing how to install your snow chains before you need them is crucial. Often, you'll be faced with harsh conditions when you need to install your chains, so it's best if you've had a chance to practice ahead of time. Installing them for the first time mid-storm is far from ideal. For added ease while chaining up, consider carrying gloves, a tarp, and a flashlight, or even better, a hands-free headlamp.

When you're installing your chains, pull into the next available turnout. Make sure you are fully off the road; do not stop in the traffic lanes to install or adjust your chains. Similarly, when you remove chains from your vehicle, be sure to pull fully off the road past the signs indicating the end of chain controls.

If you are uncomfortable installing chains on your vehicle, you can sometimes use the services of a chain installer (look for them on the side of the road at the beginning of a chain restriction area).

NOTE: Chain installers are NOT allowed to sell or rent chains, so you'll need to make sure you have chains that fit your vehicle before arriving at a chain restriction area.

Where to Purchase Chains in Mammoth Lakes

If you're driving to Mammoth Lakes in the winter, you should purchase chains to fit your vehicle before making the trip in case you hit winter weather along the way. But unexpected storms do pop up, so if you are already in town and need to purchase snow chains while you are here, check these local retailers:

NOTE: Retailers try to keep all sizes of chains stocked, however, you may need to visit more than one retailer to find the appropriate size chains for your vehicle.

MORE TIPS ABOUT WINTER IN MAMMOTH LAKES

Visitor Services

Snow Smart Driving. It’s a Mammoth Thing.

Planning a winter trip to Mammoth Lakes for skiing, snowboarding, or snowy adventure? You’re going to love it up here. If you're driving into the mountains—whether you’re flying in and renting a car or arriving in your own vehicle—winter road conditions can be unpredictable. This guide isn’t about directions or routes. It’s your winter-specific driving checklist—how to stay safe, prepared…

Learn More

Road Conditions

If you’re driving to Mammoth Lakes from late fall through early spring, you may encounter storm conditions during your drive.