Real-time open/closed reports, winter closure schedules, webcams, and Cascade Mountain pass updates across Snoqualmie Pass (I-90), Stevens Pass (US-2), Chinook Pass (WA-410), and Washington Pass (WA-20). Verified live via WSDOT Mountain Passes.
Open. Continuous 24/7 WSDOT snowplow patrols, avalanche control work, variable speed limits, and traction tire/chain mandates.
Snoqualmie Pass open or closed
Open. Key northern cross-Cascade artery. WSDOT active avalanche artillery & snow clearing. Traction tires or chains mandatory in snow.
Stevens Pass road conditions
Closed for winter due to extreme snowpack and active avalanche danger over Mount Rainier slopes. Reopens late May/June.
Chinook Pass open or closed
Closed seasonally between Ross Lake and Mazama due to massive avalanche chutes. Gates locked from Nov through May.
North Cascades Highway road conditions
Open. Vital north-south mountain link in Central Washington. Maintained year-round by WSDOT; chain advisories in winter storms.
Blewett Pass road conditions
Open. Highest elevation maintained year-round highway pass in Washington State. Continuous WSDOT snow clearing.
Sherman Pass road conditions
Open. Major southern Cascade highway and ski access route. Continuous WSDOT winter plowing and chain advisories.
White Pass open or closed
Closed seasonally due to deep snow accumulation and avalanche hazards near Mount Rainier. Reopens late spring.
Cayuse Pass road conditions
Open. Major freight route linking Goldendale and I-84 to Yakima Valley. Maintained year-round by WSDOT.
Satus Pass road conditions
Open. Links Twisp to Okanogan across the highlands. Open year-round with WSDOT snowplowing and winter traction rules.
Loup Loup Pass road conditions
Open. Traverses Colville Reservation highlands on SR-155. Maintained year-round by WSDOT and Tribal crews.
Disautel Pass road conditionsOpen. North-central Washington highway summit. Open year-round with WSDOT winter plowing and sand treatment.
Wauconda Pass road conditionsOpen. Major east-west interstate pass over high sagebrush ridge. Subject to extreme winter crosswinds and blowing snow.
Ryegrass Summit road conditionsClosed seasonally. Forest Service roads around Mt. St. Helens remain unplowed in winter for snowmobile and ski recreation.
Mount St Helens passes open or closedOpen to Crystal Mountain turnoff. WSDOT plows SR-410 continuously to the ski resort Boulevard junction throughout winter.
Crystal Mountain road conditionsQuick overview of all 15 major mountain summits and passes across Washington State with route, elevation, and winter status.
| Pass / Summit Name | Highway Route | Elevation | Mountain Range / Region | Winter Status | WSDOT Maintenance |
|---|---|---|---|---|---|
| Sherman Pass | SR-20 | 5,575 ft (1,699 m) | Kettle River Range | Open | WSDOT Highest Year-Round Pass |
| North Cascades / Washington Pass | SR-20 | 5,477 ft (1,669 m) | North Cascades Crest | Closed | WSDOT Seasonal Closure Gate |
| Chinook Pass | SR-410 | 5,430 ft (1,655 m) | Mount Rainier Slopes | Closed | WSDOT Seasonal Gate at Morse Creek |
| Cayuse Pass | SR-123 / SR-410 | 4,630 ft (1,411 m) | Mount Rainier Slopes | Closed | WSDOT Seasonal Gate |
| White Pass | US-12 | 4,500 ft (1,372 m) | Southern Cascades | Open | WSDOT 24/7 Station at Summit |
| Crystal Mountain / Greenwater | SR-410 | 4,400 ft (1,341 m) | Central Cascades | Open | WSDOT Plows to Ski Area Gate |
| Wauconda Pass | SR-20 | 4,310 ft (1,314 m) | Okanogan Highlands | Open | WSDOT Republic Maintenance Patrol |
| Blewett Pass | US-97 | 4,102 ft (1,250 m) | Wenatchee Mountains | Open | WSDOT Cle Elum Maintenance Patrol |
| Stevens Pass | US-2 | 4,061 ft (1,238 m) | Central Cascades | Open | WSDOT Avalanche Control Station |
| Loup Loup Pass | SR-20 | 4,020 ft (1,225 m) | Okanogan Highlands | Open | WSDOT Twisp Patrol |
| Mt. St. Helens Backcountry | FS-90 / FS-25 | 3,800 ft (1,158 m) | Southern Cascades | Closed | Unplowed Forest Service Route |
| Disautel Pass | SR-155 | 3,250 ft (991 m) | Colville Reservation | Open | WSDOT / Tribal Maintenance |
| Satus Pass | US-97 | 3,107 ft (947 m) | Simcoe Mountains | Open | WSDOT Goldendale Patrol |
| Snoqualmie Pass | Interstate 90 (I-90) | 3,022 ft (921 m) | Central Cascades | Open | WSDOT Hyak 24/7 Priority Station |
| Ryegrass Summit / Manastash | Interstate 90 (I-90) | 2,540 ft (774 m) | Manastash Ridge | Open | WSDOT Ellensburg Maintenance |
During severe winter weather, Washington State Department of Transportation (WSDOT) and Washington State Patrol strictly enforce chain requirements on all mountain pass routes.
All passenger vehicles must have approved traction tires (M+S or 3-Peak Mountain Snowflake) or carry tire chains when "Traction Tires Required" is declared on Snoqualmie Pass (I-90), Stevens Pass (US-2), or Blewett Pass (US-97).
When "Chains Required" is posted, tire chains must be installed on drive wheels of all vehicles, including 4WD and AWD vehicles (unless AWD with snow tires and carrying chains). Penalty for bypassing chain checkpoints is a $500 state fine.
Answers to common traveler questions regarding Washington pass road conditions, avalanche closures, and WSDOT updates.