Historical Notes Native American inhabitants were the Pomo, well known as a peaceful, artistically-gifted people. In 1852, the Walter Anderson family settled in the valley.
Nights are cool most of the year.
Rainfall averages 40 inches a year with winter lows in the 20s to 30s and summer highs ranging from the 80s to 100 degrees. Geographical Area Anderson Valley is in Mendocino County. 50 - 100, elevation 950 ft. Waterways Anderson Valley is traversed by the Navarro River and its major tributaries - Rancheria Creek, Anderson Creek and Indian Creek. These are fed by a network of streams and creeks and serve as spawning grounds for salmon and steelhead trout.