State Route 20 West - Placer / Nevada Counties

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California 20 west
California State Route 20 originates from a folded diamond interchange with Interstate 80 at Yuba Pass. Photo taken 07/11/18.
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I-80 diverges southward into Placer County while SR 20 ventures west through Bear Valley to Nevada City and Grass Valley. Photos taken 07/11/18.
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SR 20 navigates through a number of S-curves west through the settlement of Camp Spaulding. Photos taken 07/11/18.
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SR 20 nips northern reaches of Placer County between Camp Spaulding and Bear Valley. Photos taken 07/11/18.
Bowman Lake Road stems northward from SR 20 to the Sierra Discovery Trail, Clyde Mountain and Bowman Lake. Photo taken 07/11/18.
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Continuing beyond Bowman Lake Road, SR 20 curves toward Lowell Hill Ridge through Bear Valley. Photos taken 07/11/18.
Crossing the Bear River, westbound SR 20 reenters Nevada County. Photo taken 07/11/18.
Ascending out of Bear Valley, SR 20 gains 600 feet in elevation along the south slopes of Lowell Hill Ridge. Photo taken 07/11/18.
SR 20 west from I-80 to Nevada City is the Yuba Donner Scenic Byway. Photo taken 07/11/18.
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Rising to 5,200 feet above sea level, SR 20 winds through a series of switchbacks northward across Lowell Hill Ridge. Photos taken 07/11/18.
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SR 20 straightens out somewhat ahead of the Omega scenic overlook. Photos taken 07/11/18.
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SR 20 navigates through a series of S-curves northwest from Sardine Spring to Skillman Flat. Photos taken 07/11/18.
Skillman Horse Camp lies south of SR 20 on Burlington Ridge. Photo taken 07/11/18.
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Washington Road meanders north from SR 20 six miles to the community of Washington along the South Fork of the Yuba River. Photos taken 07/11/18.
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The Jefferson Creek Scenic Overlook lies just west of Washington Road on the north side of SR 20. Photos taken 07/11/18.
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Advancing west through Tahoe National Forest, SR 20 traverses areas of Washington Ridge to mile marker 30.00. Photos taken 07/11/18.
SR 20 westbound reaches White Cloud Campground. Photo taken 07/11/18.
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Continuing west from White Cloud Campground along Washington Ridge. Photos taken 07/11/18.
SR 20 lowers to 4,000 feet ahead of the turn off for Conservation Road. Photo taken 07/11/18.
Scotts Flat Road stems south from SR 20 on Harmony Ridge to Scotts Flat Reservoir. Photo taken 07/11/18.
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SR 20 gradually decreases in elevation from Harmony Ridge west to Nevada City. Photos taken 07/11/18.
Curving south between Sugarloaf Mountain and Eagle Ravine, SR 20 expands to four lanes ahead of SR 49 and the Virginia City line. Photo taken 07/11/18.
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An at-grade intersection joins SR 20 west with Uren Street east and SR 49 north toward Downieville. Photos taken 07/11/18.
SR 49 travels 42 miles south from Downieville to combine with SR 20 west along the Golden Center Freeway through both Virginia City and Grass Valley. Photo taken 07/11/18.
California 20 west & 49 south
Exit 186 departs immediately south of the merge between SR 20 west & 49 south for Coyote Street (SR 20 Business/49 Business) to Downtown Nevada City. Photo taken 07/11/18.
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Constructed in the 1960s, the Golden Center Freeway leads SR 20 west & 49 south 5.1 miles to Empire Street in the city of Grass Valley. Photos taken 07/11/18.
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Back to back half diamond interchanges add traffic from Broad Street and Sacramento Streets to the Golden Center Freeway westbound in Nevada City. Photos taken 07/11/18.
Heading through south Nevada City, SR 20/49 approach the unincorporated community of Gold Flat at Exit 185. Photo taken 07/11/18.
The Grass Valley city center lies four miles further. Beyond their separation, SR 20 turns west to Marysville while SR 49 continues another 23 miles to Auburn. Photo taken 07/11/18.
Entering the diamond interchange (Exit 185) with Gold Flat Road east and Ridge Road west on SR 20/49. Photo taken 07/11/18.
Banner Lava Cap Road spans the Golden Center Freeway high above SR 20/49, a half mile ahead of Exit 183B for Brunswick Road. Photo taken 07/11/18.
A six-ramp parclo interchange (Exit 183B) joins SR 20/49 with a sprawling retail corridor along Brunswick Road and parallel Main Street. Photo taken 07/11/18.
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Auxiliary lanes expand the Golden Center Freeway between Brunswick Road and Dorsey Drive (Exit 183A). The forthcoming diamond interchange opened to traffic on November 10, 2014.1 Photos taken 07/11/18.
Groundbreaking for the $15 million Dorsey Drive Interchange took place on April 29, 2013. The two-phase project widened Dorsey Drive to five lanes and improved 1.4 miles of SR 20/49. Aesthetic enhancements were added to concrete bridge walls, railings and street lighting. 1,272 linear feet of sound walls matching the project color scheme were installed as well.2 Photo taken 07/11/18.
The ensuing exit joins SR 20 west & 49 south with East Main Street in Grass Valley. Photo taken 07/11/18.
An auxiliary lane opens westbound from Dorsey Drive to Exit 182B for East Main Street and Idaho Maryland Road east. Photo taken 07/11/18.
Exit 182B ties into a roundabout with East Main Street and Idaho Maryland Road. The roundabout was completed in 2008. Photo taken 07/11/18.
The north end of SR 174 ties into SR 20/49 (Golden Center Freeway) at Exit 182A. Truckers are not advised along the 13.3 mile long state route south to Colfax. Photo taken 07/11/18.
A split diamond interchange (Exit 182A) joins SR 20 west & 49 south with Bennett Street, Bank Street and SR 174 (Colfax Avenue) east by Downtown Grass Valley. Photo taken 07/11/18.
A service road (Tinloy Street) links the westbound off-ramp at Exit 182A with SR 174 (Colfax Avenue) east and Auburn Street (SR 20 Business/49 Business). The city of Colfax lies at the south end of SR 174 along Interstate 80. Photo taken 07/11/18.
SR 20 west and SR 49 south part ways 0.75 miles southwest of the Bennett Street underpass in Grass Valley. Photo taken 07/11/18.
Advancing south to Boston Ravine, a third lane opens from the SR 174 entrance ramp to the diamond interchange with Empire Street. Photo taken 07/11/18.
SR 20 west and SR 49 south split at Empire Street. Empire Street ties in from Auburn Street (SR 49 Business) and Empire Mine State Historic Park to the east. Photo taken 07/11/18.
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Leading away from SR 49 (Golden Center Freeway), westbound SR 20 meets Mill Street near the Nevada County Fairgrounds at a folded diamond interchange. Photos taken 07/11/18.
A grade separation takes Brighton Street across SR 20 west at this confirming marker. Photo taken 07/11/18.
Marysville lies 34 miles to the west of Grass Valley via State Route 20. Photo taken 07/11/18.
A grade separation takes Ponderosa Way across SR 20 at Deadmans Flat. West from here, SR 20 drops from around 2,300 feet above sea level along a 6% grade into the Central Valley. Photo taken 07/11/18.
SR 20 remains an access controlled expressway west to Penn Valley. The state route passes over Rex Reservoir Road here. Photo taken 07/11/18.
Entering Penn Valley, truckers along SR 20 west are advised of the 6% grade preceding the Yuba County line. The state route drops from 1,400 feet to 900 feet in elevation along the ensuing stretch. Photo taken 07/11/18.
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Penn Valley Drive north and Rough and Ready Highway south come together at a signalized intersection with SR 20 outside Penn Valley. Photos taken 07/11/18.
SR 20 travels north of the community of Penn Valley along a controlled access bypass. Photo taken 07/11/18.
Nevada County mile post R 6.00 stands along SR 20 west near Squirrel Creek. Photo taken 07/11/18.
Pleasant Valley Road winds north from SR 20 at Penn Valley to the community of Lake Wildwood, Bridgeport on the Yuba River and unincorporated French Corral. Photo taken 07/11/18.
Pleasant Valley Road links SR 20 with adjacent Penn Valley Drive to the south. Photo taken 07/11/18.
The two-lane expressway along SR 20 parallels Penn Valley Drive (old SR 20) just to the north. The two roadways converge one mile west of Pleasant Valley Road. Photo taken 07/11/18.
Marysville lies 27 miles west of Penn Valley. Williams, where SR 20 meets I-5, follows in 63 miles. Photo taken 07/11/18.
Westbound SR 20 at Poker Flat Road and Nevada County mile marker 3.00. Photo taken 07/11/18.
A number of S-curves lead SR 20 west through Slacks Ravine. Portions of the former alignment of SR 20 remain for local access, including a segment off of Crescenzi Drive. Photo taken 07/11/18.
Winding west between Riffle Box Ravine and Peardon Hill along SR 20. Photo taken 07/11/18.
State Route 20 crosses the Yuba County line westbound between Mooney Flat Road and Meade Hill. Photo taken 07/11/18.

Sources:
  1. "Dorsey Drive interchange opens." The Union (Nevada County, CA), November 11, 2014.
  2. "Dorsey Drive Interchange named 2014 Outstanding Construction Project of the Year." The Union (Nevada County, CA), February 28, 2015.


Photo Credits:

07/11/18 by AARoads

Connect with:
State Route 49 - Mother Lode Highway
State Route 174

Page Updated 03-20-2019.