Mother Lode highway passes have closed for the winter.
Sonora Pass over Highway 108, Ebbetts Pass over Highway 4, and Tioga Pass over Highway 120, are closed until spring.
Caltrans said on Monday the recent storms and accumulation of snow triggered the pass closure at this time for highways 108 and 4.
The National Park Service, which controls Tioga Road inside Yosemite National Park, says the pass is closed likely into May or early June.
The mid-December closure is fairly typical for the state highways, although Highway 120 typically closes in November. The passes usually reopen in May.
Highway 108 is closed from 7.2 miles east of Strawberry to 3 miles west of the junction with Highway 395.
Chains or snow tires are required from 4 miles east of Strawberry and above.
Highway 4 is closed from 0.5 mile east of the junction of Highway 207 to the junction of Highway 89.
Chains or four-wheel-drive vehicles with snow tires are required from 3.5 miles east of Cottage Springs and above.
Highway 120 is closed from just east of Crane Flat to the Tioga Pass Entrance Station.
All drivers in these areas are advised to carry chains by Caltrans and the Park Service and Caltrans warned that drivers without chains in their possession may not be allowed to proceed up these highways.