Caltrans: Seasonal Pass Status


INYO AND MONO COUNTIES-The California Department of Transportation (Caltrans) in Districts 9 and 10, representing the East and West Sierra Nevada mountain range and its passes, present this comprehensive status update on the condition of the passes for the traveling public.

Unless noted as seasonal (winter) closures, the following closures are temporary closures (subject to change depending on weather conditions):

  • Ebbetts Pass (SR-4) at 3 p.m. on Tuesday, November 20, 2018

  • Sonora Pass (SR-108) at noon on Wednesday, November 21, 2018

  • Tioga Pass (SR-120) at 6:00 p.m. on Tuesday, November 20, 2018

  • Bishop Creek (SR-168W)  has closed for the winter season.

  • Mammoth Lakes (SR-203) has closed for the winter season.

Several factors weigh in to influence the temporary closing, opening and seasonal closures of our pass roadways.  Storms, accumulation of snow, and road conditions are all considered in the decision-making process by Caltrans leadership. In the case of SR-120 in Yosemite National Park, leadership confers with Caltrans to coordinate closure of park entrance gates (Tioga Road) as well as Caltrans gates (Tioga Pass). For the safety of motorists and Caltrans crews, continual updating of these passes will be assessed until the seasonal closure of each is decided.

Check ahead: Please check local highway conditions before planning to travel to the high country by visiting the Caltrans Quickmap site at or call the California Highway Information Network at 1-800-427-ROAD (7623).

For road conditions in Yosemite National Park, please visit  or call (209) 372-0200.

Be prepared: Winter weather and road conditions can change rapidly. Motorists should expect the worst conditions and be prepared when traveling in areas subject to hazardous conditions.  Caltrans reminds drivers, including those with four-wheel drive, all-wheel drive or snow tires, to carry chains and to be prepared for winter driving conditions. Drivers without chains in their possession may not be allowed to proceed.  When highway signs indicate that chains are required, drivers must stop and install chains or risk being cited and fined.

We recommend carrying blankets, water, food, a shovel, gloves, a flashlight, and sand or kitty litter to provide traction in case your vehicle becomes stuck.

No Restrictions: Watch for snow on pavement.

  • R-1: Chains are required on all commercial vehicles (large trucks or buses).  All other vehicles 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 Be Work Zone Alert.