About Anderson Valley
The four towns in Anderson Valley are:
Yorkville: population 50 - 100, elevation 950 ft.
Boonville: population 700 - 900, elevation 375 ft.
Philo: population 400 - 500, elevation 415 ft.
Navarro: population 75 - 100, elevation 260 ft.
Anderson Valley is in Mendocino County. The Valley floor is 16 miles long and varies from less than 1/2 mile to about 1 1/2 miles wide. It is surrounded on three sides by rolling hills and low mountains (2000 to 3000 feet in elevation), and opens to the Pacific Ocean via the Navarro River canyon.
The Mediterranean climate features cool, wet winters and hot, dry summers. Frequent morning fog—especially toward the coast—and a regular afternoon sea breeze keeps the air comfortable. Nights are cool most of the year. Rainfall averages 40 inches a year, with most of it falling during the late fall to early spring months.
The Navarro River and its major tributaries—Rancheria Creek, Anderson Creek and Indian Creek—are fed by a network of streams and creeks that come down from the hills and serve as spawning grounds for salmon and steelhead trout.