Northern Sonoma

Northern Sonoma, established on September 10, 1990.  The area seems as vast and amorphous as its name, encompassing Chalk Hill, Knights Valley, Alexander Valley, Dry Creek Valley, Russian River Valley, and most of Green Valley within its embrace.  The border follows Bohemian Highway in Monte Rio southeast along Dutch Bill Creek through Camp Meeker, Occidental, and Freestone, stretches along Highway 12 through Sebastopol to Fulton Road, turns north to River Road and from there traverses Mark West Springs Road to the Sonoma–Napa border.  Its north boundaries are formed by the county lines of Lake and Mendocino.