Major highways Sonoma County, California

state route 12 in sonoma (broadway)

highway 12 runs eastward intersection highway 116 in sebastopol santa rosa. there turns south through valley of moon sonoma, east napa county. four-lane freeway section within santa rosa, between fulton road , farmers lane, called luther burbank memorial highway. section, crosses highway 101, severely congested during peak commute hours.

the two-lane bodega highway runs west intersection of highways 12 , 116 in sebastopol, through coastal hills intersection highway 1, east of bodega bay. east of santa rosa, highway 12 called sonoma highway; , east of sonoma, carneros highway.

state route 37

highway 37 connects highway 101 @ novato, in marin county, interstate 80 in vallejo, in solano county, @ top of san pablo bay. within sonoma county, called sears point road.

state route 116

highway 116 winding, two-lane rural route runs jenner, @ mouth of russian river on coast, southeast arnold drive near sonoma. called guerneville highway, between guerneville , forestville; gravenstein highway north, between forestville , sebastopol; , gravenstein highway south, between sebastopol , stony point road, west of rohnert park. east of petaluma lakeville highway, stage gulch road.

state route 121

highway 121 two-lane rural route running highway 37 near sears point raceway highway 128 in lake berryessa.

state route 128

the northernmost section of highway 128 two-lane rural route running southeast highway 101 @ geyserville, north of healdsburg, through alexander valley napa county.