Ebbetts, Monitor and Sonora Passes Closed for the Winter

Ebbetts and Monitor Passes in Alpine County and Sonora Pass in Tuolumne County – The California Department of Transportation (Caltrans) closed State Route 4 over Ebbetts Pass, State Route 89 over Monitor Pass and State Route 108 over Sonora Pass. The recent storm and the upcoming weather predictions make it necessary to close these passes for the winter.

“The weather conditions on the passes and road conditions are the determining factors for the closure,” said Caltrans Maintenance Superintendant, Jon Bevan. “Caltrans closed the passes for the safety of motorists and Caltrans crews,” said Bevan.

For the latest road condition information, tune your radio to the Caltrans Highway Advisory Radio (HAR) at 530 AM or 1610 AM or call our Road Condition Hotline at 1-800-427-ROAD (7623). Changeable Message Signs with flashing beacons will have information regarding the pass closure.

Winter weather and road conditions can change rapidly. Motorists should expect the worst conditions and be prepared. All vehicles including those with four-wheel drive or snow tires should carry chains when traveling during snowy weather. If you don’t have chains in your possession, you may not be allowed to proceed. When highway signs indicate that chains are required, you must stop and install chains or risk being cited and fined.

No Restrictions – Watch for snow on pavement.
R-1: Chains are required on all commercial vehicles (trucks or buses). All other vehicles (cars, pick-ups, vans, etc.) must have either snow tread tires or chains on the drive axle.
R-2: Chains are required on all vehicles except four-wheel drives with snow tread tires. Four-wheel drive vehicles must carry chains in the vehicle.
R-3: Chains required – ALL VEHICLES – no exceptions.


For the safety of workers and other motorists, please Slow For the Cone Zone.