California State Route 121, SR 12 to SR 12/SR 29

APM: 7

Location: SR 121 and SR 12, Sonoma Cty

Reassurance shield as 12 joins 121. The highway keeps 121’s postmiles.

APM: 9

Location: SR 12 and Ramal Rd, Sonoma Cty

Reassurance shield a couple miles later.

APM: NAP/3

Location: SR 12 and Stanly Ln, Napa

A few miles later we’ll cross into Napa County and enter the city of Napa.

APM: 3

Location: SR 12 and Stanly Ln, Napa

Stay straight for 121 north/12 east.

APM: 4

Location: SR 12 and SR 29, Napa

Junction SR 29 ahead.

APM: 4

Location: SR 12 and SR 29, Napa

Turn right for 12 east and 29 south towards Vallejo and Fairfield. Turn left for 29 north and 121 north towards downtown Napa and Calistoga.