I-80 Road Conditions
Donner Pass - Bay Area & Sacramento to Truckee
Donner Summit is currently clear with no chain requirements. Roads are open—no chains or snow tires needed at this time.
Great conditions for travel
Roads are clear with no restrictions or delays.
Driving I-80 Over Donner Pass
Interstate 80 over Donner Pass is the most popular route from the Bay Area and Sacramento to North Lake Tahoe and Truckee. At 7,056 feet elevation, Donner Summit sees significant snowfall and is frequently subject to chain controls and closures during winter storms.
Chain Control Locations
Know Before You Go
- The climb from Colfax to the summit is steep and often icy
- Donner Lake area frequently has reduced visibility in storms
- High winds can cause whiteout conditions near the summit
- Weekend traffic can add 1-2 hours during ski season
Frequently Asked Questions
How often does I-80 close at Donner Pass?
I-80 over Donner Pass typically closes several times each winter during major storms. Closures can last anywhere from a few hours to over 24 hours depending on snowfall rates and avalanche conditions. The highway is most likely to close during heavy snowfall (2+ inches per hour) or when avalanche control work is needed.
Is AWD or 4WD enough for I-80 in winter?
During R1 controls, AWD/4WD vehicles with snow tires can proceed without chains. During R2 controls, AWD/4WD with snow tires on all four wheels may proceed, but 2WD vehicles need chains. During R3 controls, ALL vehicles including AWD and 4WD must have chains on the drive axle—no exceptions.
What are the best times to drive I-80 to Tahoe?
To avoid traffic, leave before 6am or after 2pm on Fridays. On Sundays, leave Tahoe before 10am or after 6pm. Midweek travel is significantly less congested. Check conditions before departing—a storm delay of a few hours can mean the difference between a smooth drive and a 4-hour crawl.
Where can I put on chains near Donner Pass?
Eastbound chain controls typically start at Applegate (Exit 135) or Kingvale (Exit 165). Westbound controls start at Truckee Scales (Exit 186) or Nyack (Exit 174). Chain installers are often available at these locations for $30-50, or you can install them yourself in designated chain-up areas.
Are there alternatives if I-80 is closed?
If I-80 closes, Highway 50 over Echo Summit to South Lake Tahoe is sometimes open (though it often closes in the same storms). Highway 88 over Carson Pass to Kirkwood is another option. During major storms, all Sierra passes may be closed—check conditions on all routes before rerouting.
Winter Driving Guide for I-80 Donner Pass
As the primary artery between the Bay Area and North Lake Tahoe, I-80 is heavily trafficked and heavily maintained, but weather on Donner Pass demands respect and preparation.
What to Expect on I-80
I-80 is a major interstate, meaning it's generally the first to be plowed and the last to close. However, it handles a massive volume of commercial truck traffic, which can cause significant delays, especially when chain controls are in effect. The drive is a long, gradual ascent from the west, but weather conditions can change quickly as you climb towards the 7,056 ft summit. Expect heavy traffic on weekends and holidays, and plan for delays.
Chain Control Checkpoints
Caltrans implements mandatory chain controls to keep traffic moving safely. You'll typically encounter checkpoints on the west slope near Applegate or Kingvale and on the east slope in Truckee. Officers will check your vehicle to ensure you have the right equipment.
Chain Requirements Explained
- R1: Chains required except for vehicles with snow tires or AWD/4WD. You must still carry chains.
- R2: Chains required except AWD/4WD with snow tires on all four wheels. Most common during storms.
- R3: Chains required on ALL vehicles, no exceptions. Usually precedes highway closure.
Pro Tips for a Smoother Trip
- Fuel Up: Fill your tank in Sacramento or Reno. Fuel is expensive in the mountains, and getting stuck in traffic with low fuel is stressful.
- Travel Off-Peak: Arrive before 8 AM or after 8 PM on Fridays to avoid the worst traffic.
- Pack for Patience: Have water, snacks, blankets, and a charged phone. A 2-hour drive can become 6 hours.
- Stay Back from Plows: Keep at least 4 car lengths behind snowplows. Never pass on the right.