PETALUMA GAP AVA
The Petaluma Gap AVA is one of California's only appellations defined primarily by wind. The Alcohol and Tobacco Tax and Trade Bureau approved it on December 7, 2017, after a long campaign by the Petaluma Gap Winegrowers Alliance led in part by Ana Keller of Keller Estate. The AVA covers roughly 200,000 acres across southern Sonoma County and northern Marin County, including the city of Petaluma, and lies entirely within the larger Sonoma Coast AVA. Of that footprint, only about 4,000 acres are planted.
What makes the Gap distinct is the geography of a 15-mile-wide break in the coastal hills that runs from the Pacific Ocean inland to San Pablo Bay. Cold Pacific air pours through this gap throughout the growing season, accelerating across the open landscape. According to Jancis Robinson's coverage of the December 2017 TTB final ruling, the boundaries of the AVA were determined by where the wind off the Pacific Ocean through the Petaluma Gap maintains a regular speed of at least 8 miles per hour. Heavy morning fog rolls in alongside the wind, and temperatures consistently swing 40 to 50 degrees Fahrenheit over the course of a single day. Soils are diverse — volcanic, loam, and clay — but the wind is what unifies the appellation.
That climate produces grapes with thick skins, small clusters, and concentrated flavors at lower sugar levels than warmer sites. Pinot Noir dominates, accounting for roughly 75 percent of plantings, with Chardonnay and Syrah making up most of the rest. Petaluma Gap wines show a recognizable profile: bright natural acidity, salty mineral lift, vivid red and dark fruit aromatics, and a textural intensity that growers consistently describe as the work of the wind. Syrah from the Gap often leans Northern Rhône, with savory pepper, smoked meat, and floral lift, while Chardonnay shows the kind of nervy precision that food-friendly cool-climate whites are known for.
Keller Estate, founded by Arturo Keller and his wife Friedl in the 1980s and now run by their daughter Ana Keller, is the appellation's most visible producer and was central to the AVA petition. The La Cruz Vineyard was planted in 1989, and the estate is known for its sustainable farming, hand-dug 450-foot cave, and a notable classic car collection. Other significant vineyards include Gap's Crown, owned by Bill Price of Three Sticks Wines; Sun Chase, owned by Alex Guarachi; Roberts Road, farmed by the Sangiacomo family; and Griffin's Lair, a renowned source for Syrah. Producers working with Petaluma Gap fruit include Kosta Browne, Patz & Hall, Rodney Strong, Ramey Wine Cellars, Pax Mahle, Walt Wines, and Trombetta Family Wines.
For buyers, the Petaluma Gap offers a rare combination of working agricultural landscape, dairy heritage, and serious viticulture within a quick drive of San Francisco. Land here often comes with a story and a view stretching to the Pacific or San Pablo Bay.
