Before you climb the pass: getting ready for Oregon’s chain rules

You leave Portland in the dark, coffee in the cup holder, and the highway climbs past Zigzag toward Mount Hood. A yellow Snow Zone sign blinks through the trees and the shoulder widens into a chain-up pullout. If you already know what that sign means, where to stop safely, and whether the gear in your trunk meets Oregon’s rules, you keep rolling. If not, here’s how to be ready before the grade steepens.

What do Oregon’s Snow Zone and chain signs actually require?

ODOT uses specific messages on permanent and portable signs to set winter traction rules. You’ll see wording such as “CARRY CHAINS OR TRACTION TIRES” when conditions are developing, and “CHAINS REQUIRED – TRACTION TIRES ALLOWED ON VEHICLES UNDER 10,000 GVW” when the road surface is actively snowy or icy. Those phrases are standardized and appear statewide, so you’ll read the same language at Government Camp, Santiam Pass, or Siskiyou Summit.

“Traction tires” in Oregon means studded tires, retractable studs, or non‑studded winter tires that meet the industry’s severe snow standard and carry the Three‑Peak Mountain Snowflake symbol. If you’re on all‑seasons without that symbol, you don’t have traction tires under Oregon’s definition and you’ll need chains when the signs say chains are required.

In most winter conditions, a 4WD or AWD passenger vehicle can be exempt from using chains if all of these are true at the same time: the vehicle is not towing, it has an unloaded weight of 6,500 pounds or less, it is carrying chains, it has traction tires on every wheel, and it is being operated safely. If a sign states that chains are required on all vehicles, that exemption doesn’t apply and you must chain up.

If you’re unsure what’s posted ahead, use TripCheck before you roll and while you’re stopped. Inside Oregon, call 511 for road and weather; outside Oregon call 503‑588‑2941 or 800‑977‑6368. Those lines mirror TripCheck’s pass conditions and camera feeds in real time, so you’ll know whether you’re headed into a “Carry chains” zone or a live chain requirement before you crest the hill.

Enforcement is real. For passenger vehicles, failing to comply with chain or traction‑tire rules when signs require them is a Class C traffic violation. For commercial vehicles, Oregon raised the specific fine for failing to use chains when required to $880. If a “conditional closure” is in place, law enforcement and ODOT staff will be on site to turn unprepared drivers around at the checkpoint rather than let them into the hazard.

Portland to Bend: US 26 over Mount Hood or Santiam Pass on OR 22/US 20?

Between Portland and Bend you really have two mountain choices. US 26 climbs to Government Camp at roughly 3,900 feet before turning south on OR 97. OR 22/US 20 swings through the Willamette Valley and climbs to Santiam Pass at about 4,817 feet before dropping into Sisters and Bend. Which one feels “easier” depends on the snow line and wind: Santiam is higher but often has broader shoulders and long, steady grades; Mount Hood can ice early and frequently posts “Chains required” at Timberline Road and on OR 35 toward Meadows.

If your plan involves skiing or riding, remember Oregon’s Sno‑Park permit requirement from November 1 through April 30. As of this season, a Daily permit is $4, a 3‑Day permit is $9, and an Annual permit is $25. You can buy them at DMV field offices and many mountain retailers, and permits from California and Idaho are honored here (and vice‑versa for Oregon permits, except the interim annual).

Staging your chain routine is easier if you plan your last services stop just before the climb. On the Mount Hood corridor, the Les Schwab Tire Center in Sandy at 37895 Highway 26 lists hours of Mon–Fri 8:00 a.m.–6:00 p.m. and Sat 8:00 a.m.–5:00 p.m. Staff can confirm chain sizing for your tires and show you a safe install technique well before you’re kneeling in slush at Government Camp.

Don’t want to drive the last icy miles to the lodge at all? The Mt. Hood Express bus runs daily between Sandy and Timberline. Current posted fares are $2 one way and a $5 day pass that also works on Sandy Area Metro; children 6 and under ride free. You can even buy tickets at the Timberline Day Lodge, which is handy when a mid‑day whiteout changes your plan.

Which traction devices work in Oregon, and how many chains do I need?

Oregon recognizes chains as link chains, cable chains, or any other device designed to attach to the wheel or the outside of the tire specifically to increase traction on snow and ice. “Traction tires” are winter‑rated tires that meet the severe snow service standard or studded tires used within the legal season (Nov 1–Mar 31). If a sign says chains are required, traction tires alone may not be enough unless the sign expressly allows traction tires for vehicles under 10,000 GVW.

For light‑duty vehicles 10,000 pounds GVW or less, Oregon’s minimum chain placement is one tire on each side of the primary drive axle. If your vehicle is front‑wheel drive, that means both front tires; for rear‑wheel drive, both rears. When a sign states “Chains required on vehicles towing or over 10,000 GVW,” a passenger car that is not towing can usually proceed on traction tires if conditions match the sign text. If the message reads “Chains required on all vehicles,” everyone chains up.

Your kit matters as much as the device choice. ODOT’s own winter guidance suggests packing a waterproof tarp or plastic sheet to kneel on, a pair of work gloves, and a flashlight or headlamp so you can see the inside of the wheel well. Practice a full install at home on a dry driveway at least once; the five minutes you spend now will save you ten on the shoulder in a squall.

One more Oregon‑specific detail: ODOT sometimes posts a “Carry chains or traction tires” requirement ahead of the storm. That’s not a suggestion. If you pass that sign and an officer or flagger asks to see your chains, they need to be in your vehicle, sized correctly for your tire, and in a sufficient number to meet the minimum placement rule for your axle layout.

Where are the safe pullouts to chain up on the passes you actually drive?

ODOT maintains paved chain‑up areas on major grades statewide and publishes a map with insets for Mount Hood, Santiam Pass, and Siskiyou Summit. On the Mount Hood loop you’ll find shoulder‑widened spaces near Zigzag, in and around Government Camp, and on OR 35 near the White River viewpoint. Santiam has dedicated pullouts on OR 22/US 20 close to Santiam Junction and at the summit. I‑84 in eastern Oregon and I‑5 in southern Oregon have long signed chain‑up zones before the steeper climbs, and during active chain control you’ll often find state staff staging traffic there.

Don’t install on the travel lane. Use a pullout that is long enough to give you space behind and ahead, turn on your hazards, and set your parking brake before you reach for the bag. If traffic is backing up, take the extra minute to move further into the pullout or to the next one rather than stop where passing vehicles must cross the fog line to get by.

If you end up at Timberline and conditions change mid‑day, you have an EV option while you wait for plows. Timberline lists six EV charging stations in the main lot by Wy’East Day Lodge, a posted 4‑hour maximum, and a $5 per hour idle fee after a one‑hour grace period. That’s enough time to top off, warm up, and recheck TripCheck before you drive back down to US 26.

TripCheck’s cameras are worth saving as favorites before you go. The US 26 at Government Camp camera and the Santiam Pass camera show real‑time surface and traffic. If you’re outside Oregon and trying to decide whether to wait for the plow run, call 503‑588‑2941 for the same information that 511 gives inside the state.

Headed south over I‑5’s Siskiyous?

The Siskiyou climb south of Ashland is the highest point on all of I‑5 at about 4,310 feet. Grades reach 6 percent and the summit often sits right on the snow line, so conditions can switch from wet to packed snow in a mile. ODOT and Oregon State Police frequently use conditional closures here in major storms, holding traffic at chain‑up areas until you’ve installed proper devices or until a plow platoon has worked a fresh band of snow.

If you’re driving a commercial vehicle, be aware that Oregon requires you to carry chains whenever Snow Zone signs are posted and road conditions might need them. The agency even permits vetted chain‑up helpers in set locations on corridors like I‑84 in winter, but the driver remains responsible for compliance. Fail to chain when required and you risk that $880 fine and a long delay while you wait for the next plow cycle.

Passenger cars play a role in keeping the corridor moving too. If the sign reads “Chains required on all vehicles”, AWD and traction tires aren’t a workaround; you’ll be turned around if you try to proceed unchained. If the message permits traction tires on vehicles under 10,000 GVW, make sure your tires truly carry the severe‑snow mountain‑snowflake mark before you assume you’re covered.

Key things to do before you hit the grade

• Check the forecast and call 511 (or 503‑588‑2941 from out of state) to hear exactly which Snow Zone message is posted on your route.
• Buy, size, and practice with your chains at home. If you need hands‑on help, the Sandy Les Schwab on US 26 is open Mon–Fri 8–6, Sat 8–5 and sells tire chains and winter gear.
• Decide your corridor (US 26 vs OR 22/US 20) by where the snow line sits. Santiam is higher at ~4,817 ft; Government Camp is lower at ~3,900 ft.
• If you’ll park at a Sno‑Park, have a permit visible: $4 daily, $9 three‑day, $25 annual, valid Nov 1–Apr 30.
• Keep a tarp, gloves, and headlamp in the chain bag. Plan to use signed chain‑up pullouts, not the travel lane.
• For Mount Hood trips, keep $2 handy in case you decide to ride the Mt. Hood Express from Sandy or Government Camp to Timberline. A $5 day pass covers round‑trips and local transfers.
• Remember the dates: studded tires are legal in Oregon from Nov 1–Mar 31. Outside those dates, rely on traction tires and chains.

Reader Q&A

Do I still have to carry chains if my SUV is AWD on winter tires?

Yes. When signs say “Carry chains or traction tires,” the rule applies to you too. In many conditions AWD with traction tires can be exempt from actually installing chains if you’re not towing and meet the weight and safety conditions, but you must still have chains in the vehicle in case the message changes to “Chains required on all vehicles.”

Where should I plan to chain up driving to Timberline?

US 26 has several widened shoulders and pullouts between Zigzag and Government Camp, and Timberline Road posts chain requirements for 2WD vehicles frequently. If you prefer to avoid installing on the mountain at all, stage in Sandy, confirm your chain fit at the Les Schwab (Mon–Fri 8–6, Sat 8–5), and switch to the Mt. Hood Express bus for the final climb for $2 one way.

What are the actual pass elevations I should care about between Portland and Bend?

The two that shape your plan are Government Camp on US 26 at roughly 3,900 feet and Santiam Pass on OR 22/US 20 at about 4,817 feet. When the snow line is marginal, that extra 900 feet at Santiam can be the difference between wet pavement and a full chain requirement.

Is there a place to charge an EV at Timberline if I wait out a storm?

Yes. Timberline lists six EV charging stations in the main lot near Wy’East Day Lodge, with a 4‑hour maximum stay and a posted $5 per hour idle fee after a one‑hour grace period. It’s enough to top off while you watch TripCheck’s Government Camp camera.

When you’re choosing between routes or wondering whether to ride the bus for the last few miles, let the sign language, the pass elevation, and your gear decide. If the Snow Zone says carry or chain, you’ll be ready either way, and you won’t waste time at a checkpoint figuring it out in the wind.

Published: September 28, 2026 · Reviewed by the State Of Oregon editorial team