California State Route 121

File:Napa-Sonoma sign 2019 - Stierch.jpg

The route begins at SR 37 in Sears Point, and then runs past the Tolay Lake basin and across Tolay Creek near Infineon Raceway. As it continues northward through Sonoma County, it meets SR 116, where it then veers east. SR 121 then enters Schellville, where it begins a short overlap with SR 12. Upon leaving, it begins another overlap with SR 29, which happens to be a freeway, in Napa County. When it leaves, it continues northward and meets SR 221 in Napa. As it leaves the city, it continues northward for several miles before reaching its north end at SR 128 near Lake Berryessa.

SR 121 is part of the California Freeway and Expressway System,{{CAFESystem}} but is not part of the National Highway System,{{FHWA NHS map|region=californianorth|accessdate=}} a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.{{FHWA NHS}} SR 121 is eligible to be included in the State Scenic Highway System,{{CA scenic}} but it is not officially designated as a scenic highway by the California Department of Transportation.{{Caltrans scenic|accessdate=September 30, 2017}} The California Legislature named the route Carneros Highway from its southern terminus to its junction with SR 29 in Napa, after the Carneros settlement.{{CA Named Freeways | pages=76, 240}} The stretch in Sonoma County between SR 37 and SR 116 runs along Arnold Drive, and along Fremont Drive between SR 116 and the Napa County line.

File:California 37 1957.svg

The section from SR 37 to SR 29 in Napa remains virtually unchanged since its definition in 1963. The northern section, however, was slightly altered since its definition the same year due to a realignment of various other freeways.{{cite web|url=http://www.cahighways.org/121-128.html#121|title=California Highways:Routes 121 through 128|author=Faigin, Daniel P.|access-date=2010-04-27}}

{{CAinttop|post_ref=
{{Caltrans bridgelog|date=April 2008}}California Department of Transportation, [http://traffic-counts.dot.ca.gov/ All Traffic Volumes on CSHS], 2007

}}

{{CAint

|county=Sonoma

|cspan=4

|county_note=SON 0.00-11.62

|location=Sears Point

|postmile=0.00

|road={{Jct|state=CA|SR|37|city1=Vallejo|city2=Novato}}

|notes=South end of SR 121

}}

{{CAint

|location=none

|postmile=6.69

|road={{Jct|state=CA|SR|116|dir1=west|name1=Arnold Drive|city1=Glen Ellen|city2=Petaluma|road|Bonneau Road}}

|notes=

}}

{{CAint

|location=Schellville

|type=concur

|postmile=7.44

|road={{Jct|state=CA|SR|12|dir1=west|name1=Broadway|city1=Sonoma|city2=Boyes Hot Springs|city3=Glen Ellen}}

|notes=South end of SR 12 overlap

}}

{{CAint

|location=none

|postmile=R10.79

|road=Napa Road

|notes=

}}

{{CAint

|county=Napa

|cspan=9

|county_note=NAP 0.00-22.08

|location=Napa

|lspan=6

|type=concur

|postmile=R4.47

|line=yes

|postmile2=R8.66Indicates that the postmile represents the distance along SR 29 rather than SR 121.

|pmspan=2

|road={{Jct|state=CA|SR|29|SR|12|dir1=south|dir2=east|city1=American Canyon|city2=Vallejo|city3=Fairfield}}

|notes=North end of SR 12 overlap; south end of SR 29 overlap

}}

{{Jctplace

|state=CA

|mile=none

|place=South end of freeway on SR 29

}}

{{Jctplace

|state=CA

|postmile=R10.30

|line=yes

|postmile2=R4.47

|pmspan=2

|place=North end of freeway on SR 29

}}

{{CAint

|type=concur

|mile=none

|road={{Jct|state=CA|SR|29|dir1=north|city1=Calistoga|road|Imola Avenue west}}

|notes=Interchange; north end of SR 29 overlap; SR 29 exit 16

}}

{{CAint

|postmile=6.01

|road={{Jct|state=CA|SR|221|dir1=south|name1=Soscol Avenue south|city1=Vallejo|city2=Oakland|road|Imola Avenue east}}

|notes=

}}

{{CAint

|postmile=6.55

|road=Soscol Avenue north – Downtown Napa

|notes=

}}

{{CAint

|location=none

|postmile=9.40

|road=Silverado Trail, Trancas Street

|notes=

}}

{{CAint

|location=none

|postmile=16.07

|road=Wooden Valley Road – Fairfield

|notes=

}}

{{CAint

|location=none

|postmile=22.08

|road={{Jct|state=CA|SR|128|city1=Winters|location2=Lake Berryessa|city3=Rutherford}}

|notes=North end of SR 121

}}

{{Jctbtm|keys=concur}}

{{reflist|group="N"}}

• {{portal-inline|California Roads}}

{{Reflist|30em}}

{{Attached KML|display=inline,title}}

{{commons category}}

{{CASR external links|SR|121}}

• [http://www.cahighways.org/121-128.html#121 California Highways: Route 121]
• [http://www.aaroads.com/california/ca-121.html California @ AARoads.com - State Route 121]

State Route 121

State Route 121

121

Category:Napa, California