Saturday, April 25 - Check in 8:30AM - Contest at 9AM

The contest will feature classes of Beef, Swine, Sheep, and Meat Goats.  In addition there will be sets of reasons.

$10 entry fee, event will occur rain or shine.

This is an excellent opportunity to improve your judging skills to help you with project animal selection and also provide you with a positive experience to improve your public speaking skills.  4-H members may wear their 4-H uniforms or appropriate attire (blazer, slacks) for reasons.  Reasons will be required to receive individual and team awards.  This event is open to all 4-H club and FFA Chapter members in California.  Awards will be given to high scoring individuals and teams.

Sunday, April 26 - Doors open at 1PM

Get ready for an unforgettable day of music, culture, and adrenaline at the Petaluma Fairgrounds on Sunday, April 26! The Primer Jaripeo Baile brings together an incredible lineup featuring Banda La Villa, Abel Lemuz y Grupo El Bueno, and Grupo Afortunados, alongside thrilling jaripeo action in the arena with talent from Oaxaca and Michoacán.

Experience vibrant performances including traditional dances, live entertainment, and nonstop energy all day long. Gather your friends and family for an authentic celebration filled with regional music, rodeo excitement, and festive vibes you won’t want to miss!

Saturday, May 2 - Judging Starts at 8:30AM

CRCS – California Rabbit and Cavy Shows, Inc. invites you to a full day of excitement on Saturday, May 2, 2026, at the Petaluma Fairgrounds! This lively event features Triple Open and Youth Rabbit Shows alongside Double Open Cavy Shows.

Whether you're exhibiting or just coming to enjoy the atmosphere, it’s a great opportunity to connect with fellow enthusiasts, showcase your animals, and be part of the fun and camaraderie that make CRCS shows so special.

Saturday, May 2 - 10AM - 6PM

The Wine Country Card Show is back at the Petaluma Fairgrounds, bringing a full day of sports cards, TCG, collectibles, and more. Attendees can take advantage of on-site grading submissions with DSG Grading and professional framing services from World of Sports Memorabilia—just bring your items and leave with them display-ready.

Whether you're a seasoned collector, an investor, or just getting started, this family-friendly event offers tons of vendors and great vibes all day.

Sunday, May 3 - 12PM - 4 PM

Get ready for high-flying action and nonstop excitement as Lucha Libre Promotions brings the energy of Cinco de Mayo to the Petaluma Fairgrounds on Sunday, May 3, 2026! Experience the thrill of live luchadores in an unforgettable event full of culture, color, and entertainment.

Be one of the first 20 fans to grab tickets for just $15. Proudly sponsored by World of Sports Memorabilia and Endzone Experience USA; this is one celebration you won’t want to miss!

Every 3rd Sunday of the Month, 9AM - 3PM

Petaluma Vintage™ is a monthly outdoor market featuring a curated selection of over 85 vintage and antique dealers specializing in all things cool, nostalgic and collectable. 

Toys, Comics, Vintage Clothing, Jewelry, Hats, Mid Century Furniture, Decor, Lamps, Kitchen/Bar Ware, Records, Video Games, Concert T-Shirts, Trading Cards, Books, Posters, Art, Music Instruments, Antique Hand Tools, Vintage Steiff, Tin Toys, Boho Style, Shabby Chic, & Art Nouveau.