Do You Need 4WD or AWD for a Utah Ski Trip?

You don't always need 4WD for a Utah ski trip, but you often need the right tires, and in the Cottonwood Canyons a 2WD rental car on ordinary tires can be turned back at the bottom of the road. For Park City and Deer Valley, a 2WD car is usually fine on I-80, as long as it meets the traction law on the days UDOT turns it on.

Drive type is only half of the rule. Utah's traction law is mostly about tires, and that's where rental cars catch people out.

What Utah's traction law requires

When UDOT activates the traction law, here's what each kind of vehicle needs:

"M+S" and the three-peak mountain snowflake are both stamped on the tire sidewall. M+S is enough for AWD and 4WD but not for 2WD, which needs the snowflake symbol or chains.

UDOT announces activation on road signs, message boards, the UDOT Traffic app and its social media. Sources differ on the calendar. The current UDOT pages describe the law as triggered by conditions during the winter season. Solitude's page says Oct. 1 to April 30, and Alta's says Nov. 1 to May 1. Plan on it applying any time there's snow.

Where it applies, and how strict it is

Little and Big Cottonwood Canyons (SR-210 and SR-190) are the strictest. That covers Snowbird, Alta, Solitude and Brighton. When the beacons outside the canyons are flashing, tires also need at least 5/32 inch of tread. Since a 2025 law change, UDOT can require compliance up to 24 hours before a storm arrives, so the rule can be on while the road still looks dry.

Police enforce it at the canyon mouths: Cottonwood Heights police at Big Cottonwood, Sandy police at Little Cottonwood and the Salt Lake County Sheriff at the Snowbird Entry 1 merge. Checkpoints can turn back cars that don't comply.

I-80 through Parleys Canyon (to Park City, Deer Valley, Heber and Midway) has two levels. Class 1 applies only to vehicles over 12,000 pounds, like buses and some RVs. Class 2 applies to everyone. On the Wasatch Back, requirements generally follow current conditions, not forecasts. The traction law can also apply on Marsac Avenue in Park City and on US-40.

I-80 can still be the hard part of the trip. During a February 2026 storm, UDOT asked drivers to avoid or delay travel on Wasatch Back roads.

Destination by destination

What to check on a rental car

You book a car class, not a specific car, so check what you're actually given before you drive off:

1. Drive type. Look on the key tag, the rental agreement or the badge on the car. Ask at the counter if it isn't clear.
2. Tire markings. Find M+S or the mountain snowflake symbol on the sidewall of each tire.
3. Tread depth. For the Cottonwoods you need at least 5/32 inch. If the tires look worn, ask for another car.
4. Chains. Snowbird notes that traction devices aren't standard on Utah rental cars. Don't count on finding chains in the trunk.

UDOT runs a sticker program that pre-inspects rental cars for the canyons, including the 5/32 inch tread minimum. Its listed rental partners are Enterprise, Alamo, National, Budget, Go-Rentals and Rugged Rental. Ask whether your car carries the sticker.

When skipping the rental is the smarter call

A rental makes sense if you're splitting a week across several resorts or staying somewhere buses don't reach. For one base, it often costs more than it saves once you add parking:

• Canyons Village (Park City Mountain): $29 a day in the garage for 2026-27, with reservations. Free for carpools of 4 or more and after noon.
• Alta: $25 a day with a required reservation on Friday to Sunday and holiday mornings from Dec. 11.
• Brighton: $25 for 1 to 3 people before noon Friday to Sunday and holidays, $10 for 4 or more.
• Solitude: $35 for 1 to 3 people on weekend and holiday mornings at the Moonbeam lot.

Meanwhile, Park City's buses are free, High Valley Transit's buses are free, and UTA's ski buses up the Cottonwoods cost $5 one way and are included with Ikon and resort season passes. If you're staying in Park City, read whether you need a car there at all.

For the airport end of things, including rental cars and where every other ride picks up, see the SLC airport ground transportation guide. For Park City, the SLC airport to Park City route guide compares every option.