Which sub AVAs are part of the Russian River Valley?

In the context of the Russian River Valley, Green Valley and Chalk Hill are integral sub-AVAs (American Viticultural Areas) recognized for their unique terroirs and characteristics that contribute to the quality of wines produced in the region. The Russian River Valley, located in Sonoma County, is known for its cool climate, which is ideal for growing a variety of grape varietals, particularly Pinot Noir and Chardonnay.

Green Valley, as a sub-AVA within the Russian River Valley, benefits from the influence of the nearby coast, leading to cooler temperatures and fog that help extend the growing season, allowing for balanced acidity and flavor development in its grapes. Chalk Hill, on the other hand, is distinguished by its volcanic soils and is known for producing rich, full-bodied white wines, particularly Chardonnay.

The other named regions—Anderson Valley, Cole Ranch, Potter Valley, Redwood Valley, Bennett Valley, and Yorkville Highlands—are not sub-AVAs of the Russian River Valley; they are separate AVAs within California, each known for their own distinct viticultural qualities and specialties. This clarity of affiliation emphasizes the importance of knowing AVA boundaries and their implications for wine production and quality.