![SR-20]()
CalTrans Chain Control California State Route SR-20 Yuba-Donner Scenic Byway
NOTE: Please research chain control locations as CalTrans is currently working to update chain control descriptions for consistency with Internet mapping, like Google maps & Mapquest.
CalTrans Chain Control
For emergencies visit CalTrans.
West
R-0Upper Lake in Lake County at 1374ft elevation in District 1
.8 Miles east of MEN-LAK Co Line at milepost: 44.75
No chain controls are in effect at this time.
West
R-0Upper Lake in Lake County at 1338ft elevation in District 1
0.2 Miles west of Junction LAK-29 at milepost: 52.09
No chain controls are in effect at this time.
East
R-0Clearlake in Lake County at 1587ft elevation in District 1
.05 miles east of Red Rock Rd. at milepost: 74.68
No chain controls are in effect at this time.
West
R-0Clearlake in Lake County at 1640ft elevation in District 1
.1 Miles east of Junction LAK 53 at milepost: 75.68
No chain controls are in effect at this time.
East
R-0Clearlake in Lake County at 1640ft elevation in District 1
.1 Miles east of MEN-LAK Co Line at milepost: 75.68
No chain controls are in effect at this time.
East
R-0Clearlake Oaks in Lake County at 1131ft elevation in District 1
2.8 Miles east of Junction LAK 53 at milepost: 78.42
No chain controls are in effect at this time.
West
R-0Clearlake Oaks in Lake County at 1131ft elevation in District 1
2.8 Miles east of Junction LAK 53 at milepost: 78.42
No chain controls are in effect at this time.
West
R-0Clearlake Oaks in Lake County at 1026ft elevation in District 1
3.77 Miles east of Junction LAK 53 at milepost: 79.35
No chain controls are in effect at this time.
East
R-0Clearlake Oaks in Lake County at 1499ft elevation in District 1
5.5 Miles west of LAK-COL Co Line at milepost: 84.93
No chain controls are in effect at this time.
East
R-0Clearlake Oaks in Lake County at 1417ft elevation in District 1
6.48 Miles west of LAK-COL Co Line at milepost: 83.95
No chain controls are in effect at this time.
East
R-0Clearlake Oaks in Lake County at 1555ft elevation in District 1
5.4 Miles west of LAK-COL Co Line at milepost: 85.03
No chain controls are in effect at this time.
West
R-0Clearlake Oaks in Lake County at 1587ft elevation in District 1
4.4 Miles west of LAK-COL Co Line at milepost: 85.07
No chain controls are in effect at this time.
East
R-0Rumsey in Lake County at 1692ft elevation in District 1
1.4 Miles west of LAK-COL Co Line at milepost: 89.07
No chain controls are in effect at this time.
East
R-0Rumsey in Lake County at 1732ft elevation in District 1
.6 Miles west of LAK-COL Co Line at milepost: 89.83
No chain controls are in effect at this time.
West
R-0Rumsey in Lake County at 1732ft elevation in District 1
.6 Miles west of LAK-COL Co Line at milepost: 89.83
No chain controls are in effect at this time.
West
R-0Williams in Lake County at 1883ft elevation in District 1
At the LAK-COL Co Line at milepost: 90.42
No chain controls are in effect at this time.
East
R-0Willits in Mendocino County at 1663ft elevation in District 1
7 Miles west of Willits at milepost: 26.18
No chain controls are in effect at this time.
West
R-0Willits in Mendocino County at 1660ft elevation in District 1
4 Miles west of Willits at milepost: 28.88
No chain controls are in effect at this time.
East
R-0Ukiah in Mendocino County at 1092ft elevation in District 1
1.7 Miles west of MEN-LAK Co Line at milepost: 42.24
No chain controls are in effect at this time.
East
R-0Ukiah in Mendocino County at 1164ft elevation in District 1
1 Mile west of MEN-LAK Co Line at milepost: 43.04
No chain controls are in effect at this time.
West
R-0Williams in Colusa County at 1053ft elevation in District 3
Bear Creek Bridge - 3 Miles e/o lake/col co line at milepost: 93.63
No chain controls are in effect at this time.
East
R-0Williams in Colusa County at 1072ft elevation in District 3
Jct. 16/20 at milepost: 93.95
No chain controls are in effect at this time.
West
R-0Williams in Colusa County at 790ft elevation in District 3
Knob Tree Turnout (End of 4 Lane) - 12 Miles w/o Williams at milepost: 98.30
No chain controls are in effect at this time.
East
R-0Rumsey in Lake County at 1729ft elevation in District 3
Col/ Lake Co Line - .5 Miles West Co Line at milepost: 89.84
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 3028ft elevation in District 3
End of Frwy (1 Mile east of Nevada City) at milepost: 186.91
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 3667ft elevation in District 3
Willow Valley Road (Holding only) at milepost: 189.04
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 3743ft elevation in District 3
Five Mile house - 5 Miles e/o Nevada City at milepost: 189.56
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 3992ft elevation in District 3
Lone Grave - 6 Miles e/o Nevada City at milepost: 191.55
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 4251ft elevation in District 3
Dana's - 11 Miles e/o Nevada City at milepost: 194.71
No chain controls are in effect at this time.
East
R-0Washington in Nevada County at 4340ft elevation in District 3
Vista Point/ Washington Road at milepost: 197.81
No chain controls are in effect at this time.
East
R-0Emigrant Gap in Nevada County at 5344ft elevation in District 3
Omega Rest Area at milepost: 203.41
No chain controls are in effect at this time.
East
R-0Emigrant Gap in Nevada County at 5344ft elevation in District 3
Bear Valley - 4 Miles w/o 20/80 Jct at milepost: 207.41
No chain controls are in effect at this time.
West
R-0Emigrant Gap in Nevada County at 5492ft elevation in District 3
20/80 Junction at milepost: 211.50
No chain controls are in effect at this time.
East
R-0Emigrant Gap in Nevada County at 5649ft elevation in District 3
Sr 20-E Onr to I-80 E (20/80 Jct) (FOR I-80 CC) at milepost: 212.11
No chain controls are in effect at this time.
East
R-0Emigrant Gap in Nevada County at 5649ft elevation in District 3
Sr 20-E Onr to I-80 E (20/80 Jct) (FOR I-80 CC) at milepost: 212.11
No chain controls are in effect at this time.
East
R-0Penn Valley in Nevada County at 1456ft elevation in District 3
Penn Valley - 9 Miles w/o Grass Valley at milepost: 174.67
No chain controls are in effect at this time.
East
R-0Grass Valley in Nevada County at 1961ft elevation in District 3
Rex Reservior - 6 Miles w/o Grass Valley at milepost: 176.77
No chain controls are in effect at this time.
West
R-0Grass Valley in Nevada County at 2385ft elevation in District 3
Auburn St. On-Ramp at milepost: 180.28
No chain controls are in effect at this time.
East
R-0Grass Valley in Nevada County at 2417ft elevation in District 3
Bennet St. On-Ramp, End of at milepost: 180.92
No chain controls are in effect at this time.
East
R-0Grass Valley in Nevada County at 2440ft elevation in District 3
Idaho-Maryland Rd. On-Ramp at milepost: 181.37
No chain controls are in effect at this time.
West
R-0Grass Valley in Nevada County at 2545ft elevation in District 3
Dorsey Dr. OC at milepost: 181.67
No chain controls are in effect at this time.
West
R-0Grass Valley in Nevada County at 2634ft elevation in District 3
Brunswick Rd. On-Ramp (WB), End of at milepost: 182.52
No chain controls are in effect at this time.
East
R-0Grass Valley in Nevada County at 2627ft elevation in District 3
Brunswick Rd. On-Ramp (EB), End of at milepost: 182.64
No chain controls are in effect at this time.
West
R-0Nevada City in Nevada County at 2693ft elevation in District 3
Gold Flat On-Ramp (WB) at milepost: 183.52
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 2644ft elevation in District 3
Gold Flat On-Ramp (EB) at milepost: 183.91
No chain controls are in effect at this time.
West
R-0Nevada City in Nevada County at 2545ft elevation in District 3
Sacramento St. On-Ramp, End of at milepost: 184.37
No chain controls are in effect at this time.
West
R-0Nevada City in Nevada County at 2532ft elevation in District 3
Coyote St. On-Ramp, End of at milepost: 185.02
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 2693ft elevation in District 3
Nevada St. - Nevada City at milepost: 185.65
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 2693ft elevation in District 3
Nevada St. - Nevada City at milepost: 185.65
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 2693ft elevation in District 3
Nevada St. - Nevada City at milepost: 185.65
No chain controls are in effect at this time.
East
R-0Nevada City in Nevada County at 2693ft elevation in District 3
Nevada St. - Nevada City at milepost: 185.65
No chain controls are in effect at this time.