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September 2026 Events in Sonoma

August 20, 2026

Looking for things to do in Sonoma this September? From plein air painting and a tribute to an iconic Sonoma County art installation to food, craft beer, antiques, and one of Sonoma Valley's longest-running traditions, here are a few events to have on your radar this month.

Sept 14–19
Sonoma Plein Air Festival
Sonoma

Artists take to the landscapes of Sonoma and beyond during Sonoma Plein Air Festival Week, culminating in the annual Art Show & Sale on Sonoma Plaza on September 19. Browse freshly painted works, watch an artist demonstration, enjoy music, and see Sonoma through an artist's perspective.

Want to keep exploring Sonoma's creative side? Discover more local art, makers, performances, and hands-on experiences in our guide, Sonoma Valley Beyond Wine: Art, Makers & More.

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Sept 12
Running Fence Run
Bloomfield

Mark the 50th anniversary of Christo and Jeanne-Claude's legendary Running Fence with a run through the Sonoma County landscape where the installation once stood. Choose from a 5K, 10K, half marathon, or full marathon.

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Sept 12
Indulge Sonoma
Santa Rosa

Spend an afternoon tasting your way through Sonoma County's culinary scene with more than 50 participating restaurants, wineries, breweries, and distilleries. This 21+ event benefits Becoming Independent.

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Sept 12
Petaluma River Craft Beer Festival
Downtown Petaluma

Head to the Petaluma River for an afternoon featuring North Bay craft breweries, local food vendors, and live music along Water Street. This event is for guests 21 and over.

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Sept 24–27
Valley of the Moon Vintage Festival
Sonoma

A Sonoma tradition returns with several days of harvest celebrations, including the Sonoma Valley Harvest Dinner, Grand Tasting, grape stomp, 5K and one-mile run, live music, artisan fair, Wine Garden, and Saturday's free daytime festival on Sonoma Plaza.

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Sept 27
Petaluma Fall Antique Faire
Downtown Petaluma

Downtown Petaluma transforms into an open-air antique marketplace with more than 200 dealers offering vintage décor, furniture, jewelry, art, books, collectibles, and more. Admission is free.

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Event details are subject to change. Please confirm dates, times, ticket availability, and other information directly with event organizers before attending.

Make the Most of September in Sonoma

From art and harvest traditions to food, music, and one-of-a-kind community events, September is a lively time to explore Sonoma Valley events and the surrounding area.

If the season also has you thinking about Sonoma real estate, connecting with a knowledgeable Sonoma realtor can help put the local market into perspective. Whether you're exploring a move or curious about the value of a Sonoma Valley home, our team is here as a local resource.

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This post was created with the assistance of artificial intelligence and reviewed by the marketing team at Coldwell Banker Brokers of the Valley.

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