California Snowstorm Strands Dozens of Drivers on Donner Summit as Heavy Snow Causes Multiple Collisions on I-80

California — A powerful winter storm has left dozens of motorists stranded on Donner Summit, where heavy snowfall and whiteout conditions caused widespread spin-outs, traffic collisions and significant delays along both eastbound and westbound lanes of Interstate 80. Emergency crews and tow operators are working continuously to reach trapped drivers as snowfall intensifies across the Sierra Nevada.

Multiple Spin-Outs and Crashes Reported Along I-80

Authorities say the roadway became nearly impassable late Monday as bursts of heavy snow overwhelmed plows and reduced visibility to near zero in sections of Donner Summit. The combination of steep grades, icy pavement and fast-accumulating snowfall led to multiple crashes and spin-outs, forcing drivers to stop or abandon attempts to navigate the roadway.

Some motorists reported being unable to move for extended periods as long chains of vehicles stretched across the interstate. With temperatures dropping and snowfall continuing, conditions became increasingly hazardous for anyone attempting to travel through the mountain pass.

Tow Trucks and CHP Responding Through the Night

Tow trucks have been dispatched across both directions of I-80 to remove disabled vehicles and help reopen the roadway, but progress has been slow due to intense snowfall and ongoing slide-offs. The California Highway Patrol (CHP) confirmed it is working throughout the holiday to assist stranded travelers and manage traffic around blocked lanes.

CHP urged drivers to remain in their vehicles, conserve fuel and avoid attempting to walk along the interstate, emphasizing that visibility is extremely poor and conditions remain dangerous. Authorities also warn that the storm is expected to continue producing heavy snow bands, which may make it difficult to fully clear the roadway until weather conditions improve.

Donner Summit Frequently One of California’s Most Treacherous Winter Passes

Located at high elevation and directly in the path of Sierra winter storm systems, Donner Summit is known for its rapidly changing conditions and steep, exposed stretches of highway. Even when travel is permitted, chains or snow-rated tires are often required.

Tonight’s incident underscores how quickly winter weather can escalate in the region. Drivers heading to or from Northern California, Reno or Lake Tahoe were urged to delay travel until road crews can stabilize conditions.

Officials Urge Motorists to Avoid Travel Until Conditions Improve

With more snow expected to fall, transportation officials stress that anyone considering travel across the Sierra should check road conditions, carry emergency supplies and avoid unnecessary trips.

CHP continues to post real-time updates as crews work to reopen lanes and clear collisions. Motorists who become stranded are encouraged to stay inside their vehicles, keep headlights on, and communicate with authorities when possible. The situation remains active, and further snowfall could lead to additional closures or extended delays into the early morning hours. For ongoing weather alerts and statewide travel safety updates, visit NapervilleLocal.com.