 the napa river, approximately 55 miles (89&nbsp;km) long, is a river in the u.s. state of california. it drains a famous wine-growing region, called the napa valley, in the mountains northeast of san francisco. milliken creek and mt. veeder watersheds are a few of its many tributaries. the mouth is at vallejo where the inter-tidal zone of fresh and salt waters flow into the carquinez straits on san pablo bay. ==course== [[image:napa river napa-sonoma marsh.jpg|thumb |305px |aerial vi
Rivers_of_California Rivers_of_Napa_County,_California Rivers_of_Solano_County,_California St._Helena,_California Tributaries_of_San_Pablo_Bay