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Mountain Road Report

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This map shows real-time local traffic conditions; green means the traffic flow is normal, orange means it is slower than normal, and red and dark red indicates slow and stopped vehicles. Updating Caltrans reports for each highway are below the map click or tap on the highway signs to jump to the road you are interested in.

California Highway 4
California Highway 12
California Highway 26
California Highway 49
Highway 50
Tuolumne County J59
Interstate 80
California Highway 88
California Highway 99
California Highway 108
California Highway 120

Highway 4

[IN THE CENTRAL CALIFORNIA AREA]

Is closed 1 mi east of Camp Connell (Calaveras Co) - Due to snow
- Motorists are advised to use an alternate route

Is closed from 0.6 mi east of Lake Alpine to 7.2 mi west of the
Jct of SR 89 /Ebbetts Pass/ (Alpine Co) - For the winter - Motorists are
advised to use an alternate route

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Arnold to the Mt Reba turnoff (Calaveras Co)

Please research chain control locations as caltrans is currently working to
update chain control descriptions for consistency with internet mapping,
like google maps & mapquest.

1-way controlled traffic at the Contra Costa/San Joaquin Co Line
/at Old River Bridge/ 24 hrs a day 7 days a week thru 1900 hrs on 7/26/26
- Due to construction

Highway 12

[IN THE CENTRAL CALIFORNIA AREA]

Is closed from Waterman Ave /in Boyes Hot Springs/ to the Jct of SR 121
(Sonoma Co) - Due to flooding - Motorists are advised to use an alternate route

Highway 26

[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA]

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 6.5 mi east of Mokelumne Hill (Calaveras Co) to
the Jct of SR 88 (Amador Co)

Please research chain control locations as Caltrans is currently working to
update chain control descriptions for consistency with internet mapping, like
Google Maps & Mapquest

Highway 49

[IN THE CENTRAL CALIFORNIA AREA]

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 6.5 mi north of Oakhurst (Madera Co) to
the Madera/Mariposa Co Line

Please research chain control locations as caltrans is currently working to
update chain control descriptions for consistency with internet mapping,
like google maps & mapquest.

[IN THE NORTHERN CALIFORNIA AREA]

Is closed from 3 mi north of Grass Valley /at Newton Rd/ (Nevada Co) to the
Jct of SR 89 (Sierra Co) - Due to snow - Motorists are advised to
use an alternate route - Local residents with proper identification will be
allowed access

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 3.2 mi south of Grass Valley to Empire St
/in Grass Valley/ (Nevada Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from from 4.2 mi south of Downieville to Sattley
(Sierra Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 3.5 mi north of Camtonville (Yuba Co) to Yuba Pass
Summit (Sierra Co)

Chains or snow tires are required from Sierraville (Sierra Co) to the
Sierra/Plumas Co Line

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 7.3 mi south of Vinto to Vinton (Plumas Co)

Please research chain control locations as caltrans is currently working to
update chain control descriptions for consistency with internet mapping,
like google maps & mapquest.

Highway 50

[IN THE SACRAMENTO VALLEY & THE LAKE TAHOE BASIN]

Is closed from Pointview Dr /in Placerville to Meyers (El Dorado Co)
- due to spinouts - Motorists are advised to use an alternate route

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 9 mi east of Placerville to Meyers (El Dorado Co)

Please research chain control locations as caltrans is currently working to
update chain control descriptions for consistency with internet mapping,
like google maps & mapquest.

[CAPITAL CITY FREEWAY]

No traffic restrictions are reported for this area.

Highway 59

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

Highway 80

[IN THE SAN FRANCISCO BAY AREA - SOLANO CO]

A high wind advisory is in effect at the San Francisco-Oakland Bay Bridge
/in San Francisco/ (San Francisco,Alameda Co) - Travel is not recommended
for campers, trailers, or permit loads

There is a dense fog advisory in effect from Alamo Dr to Leisure Town Rd
/in Vacaville/ (Solano Co) - Motorists are advised to drive with caution

[IN THE NORTHERN CALIFORNIA AREA & SIERRA NEVADA]

Is closed from Colfax (Placer Co) to the Nevada State Line - Due to snow
- Motorists are advised to use an alternate route

Is closed eastbound to all tractor-semitrailer combinations at Applegate
(Placer Co) - Due to snow & traction concerns

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 3.4 mi east of Gold Run (Placer Co) to
the Nevada State Line

Please research chain control locations as Caltrans is currently working to
update chain control descriptions for consistency with internet mapping, like
Google Maps & Mapquest

All westbound trucks are required to stop at the brake check area
0.5 mi west of Nyack (Placer Co) - To reduced the risk of brake fires

[BUSINESS 80 - CAPITAL CITY FREEWAY]

No traffic restrictions are reported for this area.

Highway 88

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

Is closed from Dew Drop (Amador Co) to 5 mi west of Picketts Jct
(Alpine Co) - Due to snow - Motorists are advised to use an alternate route

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 9 mi east of Pine Grove (Amador Co) to 3.5 mi east
of Silver Lake (Amador Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 5 mi west of Picketts Jct (Alpine Co) to
3.5 mi east of Woodford (Alpine Co)

Please research chain control locations as caltrans is currently working to
update chain control descriptions for consistency with internet mapping,
like google maps & mapquest.

Highway 99

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

[IN THE NORTHERN CALIFORNIA AREA]

No traffic restrictions are reported for this area.

Highway 108

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

Is closed from 7.2 mi east of Strawberry (Tuolumne Co) to 5.8 mi west of
the Jct of US 395 (Mono Co) /Sonora Pass/ - For winter - Motorists are
advised to use an alternate route

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from to 6 mi east of Sonora to 7.2 mi east of Strawberry
(Tuolumne Co)

Chains or snow tires are required from the Jct of US 395 to 3.8 mi
west of the Jct of US 395 (Mono Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 7 mi east of Long Barn to 7.2 mi east of Strawberry
(Tuolomne Co)

Please research chain control locations as caltrans is currently working to
update chain control descriptions for consistency with internet mapping,
like google maps & mapquest.


[YOSEMITE NAT'L PARK]
For Yosemite Nat'l Park road information call 209-372-0200

Highway 120

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

Is closed at the Yosemite National Park Boundary (Tuolumne) to 3.5 mi west
of the North Jct of US 395 /Tioga Pass/ (Mono Co) - For the winter - Motorists
are advised to use an alternate route

Is closed from 5.2 mi east of the Jct of US 395 to 7.1 mi west of the
Jct of US 6 (Mono Co) - For the winter - Motorists are advised to use an
alternate route

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 2.5 mi west of Groveland to Yosemite Nat'l Park
Boundary (Tuolumne Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 3.8 mi west of the Jct of US 395 to the
Jct of US 395(Mono Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from the Jct of US 395 to 5 mi east of the
Jct of US 395 (Mono Co)

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 3.8 mi west of the Jct of US 6 to the Jct of US 6
(Mono Co)

Please research chain control locations as Caltrans is currently working to
update chain control descriptions for consistency with internet mapping, like
Google Maps & Mapquest

There is a dense fog advisory in effect from the Jct of I 5 to the
San Joaquin/Stanislaus Co line - Motorists are advised to drive with caution

[YOSEMITE NAT'L PARK]

For Yosenite Nat'l Park road information call 209-372-0200

Roads Info Last Updated: Wednesday, 18th of February 2026, 04:59:10 AM

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