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There’s something happening here all year long – this is the center for fun!

Step inside a bubble, invent something, meet a llama: It’s Imaginology 2026!

Get ready for two high-energy days where imagination takes the lead and learning feels like play. Imaginology returns Saturday and Sunday, April 11–12, transforming OC Fair & Event Center into an interactive playground of science, technology, engineering, arts, agriculture and math.

Open from 10 a.m. to 4 p.m. both days, this free family event welcomes kids of all ages to build, experiment, observe and explore together. In 2025, nearly 20,000 guests attended — and even more are expected in 2026 as excitement continues to grow.

Where STEAM comes to life

Imaginology is built on a simple but powerful philosophy: learning should feel like real life. Every exhibitor will offer a hands-on activity rooted in STEAM, empowering youth to explore skills that directly connect to future careers.

Across the fairgrounds, visitors will discover:

Wild Science adventures

Step into an immersive world of discovery featuring dozens of visually captivating, highly interactive displays. Guests can experiment with a plasma lightning tube, step inside a giant bubble, test their sense of smell, explore a Rube Goldberg machine, create music, challenge hand-eye coordination and design inventions in a maker’s fair-style space. It’s science you can see, hear and feel.

Centennial Farm experiences

The three-acre working farm will be buzzing with activity. Visitors can meet animals, learn about California crops and watch live demonstrations including oxen showcases, blacksmithing, chick education, radish-seed planting, milking demos, root digging, shearing and spinning, terrarium-making and the popular OC Beekeepers exhibit. It’s agriculture in action — up close and hands-on.

Obstacle course challenge at Heroes Hall

On the Sky Hawk lawn at Heroes Hall, kids can race, climb and jump through an inflatable obstacle course designed to test strength and agility. It’s the perfect way to mix physical activity with playful competition – and science!

Youth competitions take center stage

Imaginology 2026 features four free student competitions for preschool through 12th grade – competitions are now open:

  • New! Upcycling Project – Turn discarded materials into something innovative and useful.
  • Mural Project – Collaborate on large-scale artwork that comes together in a powerful final display.
  • Cardboard Engineering – Dream big using one of the most versatile building materials around.
  • Poster Art – Showcase creativity by blending science, technology, engineering, arts and math into a visual masterpiece.

In addition, local 4-H and FFA youth will be judged on livestock projects, animal and veterinary science knowledge, and educational exhibits. Llama and rabbit competitions will add to the agriculture excitement. More at ocfair.com/imaginology/competitions-contests.

Exhibits and entertainment for all ages

Live community entertainment will keep the energy high throughout the weekend. New this year, Sunday will feature lively rounds of bingo as part of the entertainment lineup. And Megan the Bubbleologist will wow audiences on the Plaza Stage with dazzling bubble artistry.

Exhibit spaces throughout the fairgrounds will feature nonprofit organizations, community groups and educational programs offering interactive demonstrations and creative activities. From arts organizations and robotics programs to nature centers and public safety demonstrations, every corner of Imaginology offers something new to discover.

A community tradition of discovery

Produced by OC Fair staff as a community give-back, Imaginology debuted in 1989 as Youth Expo before being renamed in 2014 to reflect its expanded STEAM focus. Today, it stands as one of the largest free family STEAM festivals in the region — a place where curiosity is celebrated and creativity shines.

Whether attendees are designing inventions, planting seeds, engineering with cardboard or cheering on young competitors, Imaginology is where ideas take flight.

For full details and updates, visit ocfair.com/imaginology.

Event at a glance

Dates: April 11–12
Hours: 10 a.m.–4 p.m.
Admission: Free
Parking: $15
Location: 88 Fair Drive, Costa Mesa, CA 92626

Public Info: 714-708-1500 | ocfair.com/imaginology | ocfinfo@ocfair.com

Follow the fun using #Imaginology and connect with OC Fair, Centennial Farm and Heroes Hall on Instagram, Facebook and TikTok for updates and sneak peeks.

What’s happening at OC Fairgrounds in March

Pacific Coast Sportfishing Show, March 5 – 8

Southern California’s largest fishing tackle, boat, travel and outdoors show returns for its 16th year. Explore eight halls and 250,000 square feet of saltwater and freshwater fishing tackle, boats, travel destinations and everything outdoors. Families and children are welcome. Enjoy bands, activities and a free kids’ catch-and-release trout pond.

When: Thursday – Sunday, March 5 – 8
Schedule:
Thursday & Friday, March 5 & 6, noon – 7 p.m.
Saturday, March 7, 10 a.m. – 7 p.m.
Sunday, March 8, 10 a.m. – 5 p.m.
Where: OC Fair & Event Center – All Fairgrounds
How much: General admission is $20, active duty military and children 12 and under are free. Parking is $15.
More info: Visit 
Pacific Coast Sportfishing

Discovery Day at the Farm, March 6

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crops education

When: Friday, March 6, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

Overland Expo SoCal 2026, March 14 – 15

Overland Expo SoCal is the premier overlanding event series in the world for adventure travel enthusiasts. This dynamic event offers hundreds of hours of hands-on classes, expert-led workshops and inspiring talks from renowned speakers and trainers from around the globe. Dive into interactive roundtable discussions, live demonstrations and discover cutting-edge gear. Overland Expo SoCal offers more than 100 hours of incredible programs—that’s 100+ different classes, slideshows, demonstrations and activities.

When: Saturday & Sunday, March 14 – 15
Schedule:
Saturday, March 14, 9 a.m. – 5 p.m.
Sunday, March 15, 9 a.m. – 4 p.m.
Where: OC Fair & Event Center – All Fairgrounds
How much: Weekend passes are $40, single-day general admission is $22, weekend camping passes are $255, children 14 and younger are free. Parking is $15.
More info: Visit Overland Expo

Redo Market, March 20 – 21

Come sip, shop and stroll over 130 vendors throughout three buildings at the OC Fairgrounds, bringing you the best in vintage clothing, surf, home decor, antiques, jewelry and more.

When: Friday & Saturday, March 20 – 21
Schedule:
Friday, March 20, 4 – 9 p.m.
Saturday, March 21, 9 a.m. – 4 p.m.
Where:  OC Fair & Event Center – Anaheim Building, Los Alamitos Building, The Hangar
How much: Friday, March 20, early-bird admission 4-6 p.m. $20, 6-9 p.m. $15; Saturday, March 21, 9-10 a.m. $12 and 10 a.m.-4 p.m. $10. Parking is $15.
More info: Visit Redo Market

Scraps to Soil: Build Your Own Worm Compost Bin, March 21

Turn everyday kitchen scraps into nutrient-rich compost with the help of hardworking worms. This hands-on class will help participants feel confident venturing into vermiculture while building a simple mini worm bin to take home.

When: Saturday, March 21, 10 a.m. – noon.; RSVP by March 14.
Where:  OC Fair & Event Center – Centennial Farm Silo Building
How much: The class fee is $25 for adults and $5 for children ages 17 and under. All materials needed to create a mini worm compost bin during the class, including worms, are provided. Participants are encouraged to bring a pair of garden gloves.
Refund policy: No refunds will be issued for cancellations made within seven days of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes

OC Card Show, March 21 – 22

Buy, sell or trade your sports cards and TCG cards at OC Card Show’s biggest event yet! With more than 250 tables split between sports and TCG, enjoy more space to connect, trade and hang out with this great community.
When: Saturday – Sunday, March 21 – 22, 11 a.m. – 5 p.m.
Where: OC Fair & Event Center – Costa Mesa Building
How much: Saturday early access admission is $15; general admission is $10. Sunday general admission is $5. Parking is $15.
More info: Visit OC Card Show

Discovery Day at the Farm, March 24

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crops education

When: Tuesday, March 24, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

OC Fair Board of Directors Meeting, March 26

When: Thursday, March 26, 9:30 a.m. 
Where: OC Fair & Event Center Administration Building or virtually on Zoom.
More info: Visit Public Meetings

Citrus for Southern California Gardens: Choosing, Growing and Caring for Trees, March 28

Whether you are planting your first citrus tree or looking to improve the health and productivity of established trees, this informative class led by Isabel Barkman provides practical, region-specific guidance. Participants will learn how to select citrus varieties best suited for Southern California, understand rootstocks and tree size and apply best practices for planting, watering, fertilizing, mulching and pruning. The class also covers seasonal care, common pests, diseases and tips for keeping citrus trees productive year after year. This lecture-based class is designed to build confidence and help gardeners make informed decisions for long-term citrus success.

When: Saturday, March 28, 10 a.m. – noon.; RSVP by March 25
Where:  OC Fair & Event Center – Centennial Farm Silo Building
How much: $7 fee covers materials and any handouts.
Refund policy: No refunds will be issued for cancellations made within 48 hours of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes


Ongoing at OC Fair & Event Center

Centennial Farm

Centennial Farm is home to fruit and vegetable gardens, livestock and the Millennium Barn. Two youth educational tour programs are offered – Discovery Days and Jr. Farmer Tours – as well as daily hours so the public can visit our year-round working farm. 

When: Monday – Friday, 1 – 4 p.m.; Saturday & Sunday, 10 a.m. – 4 p.m. Excluding holidays and all-grounds events; see calendar for closures.
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Centennial Farm

Farmers Market

Shop local at this OC Farm Bureau-certified farmers market featuring produce, fish, hummus, honey, hot sauce and a variety of offerings. Some vendors also sell hot food for lunch, such as dumplings, burritos and more.

When: Thursdays, 9 a.m. – 1 p.m.
Where: OC Fair & Event Center – Lot D
How much: Free admission and parking.
More info: Visit OC Farm Bureau 

Heroes Hall

Heroes Hall is a free, permanent, year-round museum and education center with exhibitions, performances and educational programs that celebrate the legacy of Orange County veterans and others who have served our nation. The two-story exhibition space rotates themes with each focusing on an aspect of the personal stories and experiences of veterans.

The current exhibit, “Echoes of Conflict: Remembering Vietnam,” offers a powerful and immersive journey through one of modern history’s most complex and divisive conflicts. Through a rich collection of artifacts, personal stories, historical facts and poignant memorabilia, visitors will gain a deeper understanding of the war’s profound impact on the soldiers who fought and the broader global context. On display through Sept. 20.

When: Wednesday – Sunday, 10 a.m. – 4 p.m. Excluding holidays and all-grounds events; see calendar for closures.
Where: OC Fair & Event Center – Heroes Hall Museum & Education Center
How much: Free admission and parking.
More info: Visit Heroes Hall

The Ranch Community Center

The Ranch Community Center celebrates horses, ranching and nature. Free and low-cost public programs are offered, including The Ranch Discovery Days, The Ranch After-School Program, horse shows and equine-assisted therapy. Visitors can connect with the equestrian community year-round during daily hours.

When: Monday – Friday, 8:30 a.m. – 4:30 p.m.; Saturday, 8:30 a.m. – 4:30 p.m.
Closed Sundays and all holidays.
Where: OC Fair & Event Center – The Ranch Community Center
How much: Free admission and parking.
More info: Visit The Ranch

Centennial Farm Pig Cam

Want to keep tabs on our pigs all year long? Watch the Centennial Farm pigs LIVE on our official Pig Cam and see what these adorable rascals are up to!

More info: Visit Centennial Farm Pig Cam


Coming up in April

Discovery Day at the Farm, April 2

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crop education

When: Thursday, April 2, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

OC Japan Fair, April 3 – 5

Grab your friends and experience tasting, shopping and learning about Japanese culture. Enjoy a cosplay show, tuna cutting show, popular Japanese artists/comedians performances, traditional instrument performances, games, a kimono models meet and greet and more!

When: Friday – Sunday, April 3 – 5
Schedule:
Friday, April 3, 4 – 10 p.m. Saturday, April 4, Noon – 10 p.m.
Sunday, April 5, 11 a.m. – 7 p.m.
Where: OC Fair & Event Center – Anaheim Building, Los Alamitos Building, Lot I, OC Promenade, The Hangar
How much: Presale admission through April 2 is $19.98, general admission is $23.18 starting April 3. Free admission for children 6 and younger and seniors over 65.
More info: Visit OC Japan Fair

Fight Club OC, April 9

The most fun you can have on a Thursday night in Orange County! Boxing and MMA fights are presented by Roy Englebrecht Promotions.

When: Thursday, April 9
Schedule:
Baja Bar & Grill happy hour, 5:30 – 6:30 p.m.
Hangar doors open at 6 p.m.
First fight starts at 7 p.m.
Where: OC Fair & Event Center – The Hangar
How much: General admission varies. Parking is $15.
More info: Visit Fight Club OC

OC Fair’s Imaginology, April 11-12

Each April, OC Fair & Event Center transforms into Imaginology, a free family event produced by OC Fair staff that focuses on STEAM education and hands-on learning.

Children, teens, families and school groups dig into science, technology, engineering, arts and math. Imaginology provides unique experiences for attendees of all ages – from preschool to high school, along with their parents, grandparents and friends – to build, create, play, observe and interact through activities that help kids of all ages see the possibilities of a future in STEAM fields.

Imaginology features makeshops, demonstrations, competitions, hands-on activities and entertainment, as well as food and fun. Youth competitions give students the chance to be recognized for their unique talents and accomplishments.

When: Saturday & Sunday, April 11-12, 10 a.m.-4 p.m.
Where: OC Fair & Event Center – Centennial Farm, Costa Mesa Building, Country Meadows, Heroes Hall, Huntington Beach Building, Park Plaza, Plaza Pacifica, Santa Ana Pavilion
How much: Admission is free. Parking is $15. 
Schedule of events: 2026 Imaginology will feature live entertainment and tons of hands-on activities for kids of all ages.
More info: Visit ocfair.com/steam

Hydroponics for the Home Gardener: Build Your Own System, April 18

Join UC Master Gardeners for an engaging, hands-on class that takes hydroponic gardening to the next level! This session introduces participants to the fundamentals of growing plants without soil, using nutrient-rich water. Attendees will learn about plant care, nutrient solutions, lighting requirements and system maintenance. Additionally, the class will feature a DIY portion in which participants assemble a simple hydroponic system designed for a single plant, which they can take home and use right away. All supplies, including a lettuce seedling, will be provided. Whether you have a small patio, a second-story balcony or a free spot indoors, hydroponic gardening is a space-efficient and sustainable way to grow fresh food year-round.

When: Saturday, April 18, 10 a.m.-noon; RSVP by April 13.
Where: OC Fair & Event Center – Centennial Farm Silo Building
How much: A $15 fee covers all materials, including a simple hydroponic system and a lettuce seedling to take home.
Refund policy: No refunds will be issued for cancellations made within 48 hours of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes

TinyFest, April 18 – 19

Attend for one day or spend the weekend exploring all things tiny living. Whether you’re a tiny home enthusiast or just curious about the lifestyle, this event is perfect for you.

  • Tour tiny homes, ADUs, van conversions and bus builds
  • Shop the Simple Living Marketplace
  • Take a seat at speaker presentations, Q&A sessions and panel discussions

TinyFest is more than a showcase – it’s a celebration of creativity and community. Whether you’re downsizing, dreaming or already living tiny, you’ll find inspiration and connection around every corner.

When: Saturday & Sunday, April 18–19, 10 a.m.–5 p.m.
Where: OC Fair & Event Center – Los Alamitos Building, Lot I
How much: Single-day general admission is $22.50; weekend passes are $30; single-day VIP admission is $119. Children 15 and younger are free. Parking is $15.
More info: Visit TinyFest

OC Wine Fest, April 18 – 19

Orange County Wine Fest is OC’s favorite celebration of wine – bringing together wineries, winemakers and wine lovers for a memorable tasting experience. Guests enjoy three hours of unlimited wine tastings, discover a wide variety of styles and regions and connect directly with the people behind the pours – all in a fun, social atmosphere.

From bold reds and crisp whites to rosé, sparkling wines and unique finds, this is your chance to explore, sip and celebrate wine.

When: Saturday & Sunday, April 18 – 19
Schedule:
Saturday, April 18
Session 1: Noon – 3 p.m.
Session 2: 5 – 8 p.m.
Sunday, April 19, noon – 3 p.m.
Where: OC Fair & Event Center – The Hangar
How much: Ticket prices vary. Parking is $15.
More info: Visit OC Wine Fest

Discovery Day at the Farm, April 22

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crop education

When: Wednesday, April 22, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

OC Fair Board of Directors Meeting, April 23

When: Thursday, April 23, 9:30 a.m. 
Where: OC Fair & Event Center Administration Building or virtually on Zoom.
More info: Visit Public Meetings

Air|Water, April 25

The 2026 installment returns to Costa Mesa, CA. Building off of the vibrant Californian Porsche passion Air|Water welcomes everyone to experience all things Porsche. From the amazing cars and people to the exhibitor hall and live Broad Arrow Porsche Auction, this is the go-to place for the newest and most dedicated fans.

When: Saturday, April 25
Where: OC Fair & Event Center – All Fairgrounds
How much: Ticket prices vary. Parking is $15.
More info: Visit Air|Water

OC Fair & Event Center wins 22 industry awards from Western Fairs Association

COSTA MESA (Feb. 12, 2026) – OC Fair & Event Center (OCFEC) earned 22 Achievement Awards from Western Fairs Association, including 21 first-place honors.

The annual program recognizes innovation and excellence among fairs and festivals in the Western U.S.

Eleven of the first-place awards were in photography categories including entertainment, carnival, first responders, exhibits, animals and people at the fair. Other top honors were for community outreach for OC Fair’s We Are OC! A Cultural Celebration, agricultural programming, volunteerism and sponsorship. Marketing and creative wins went to logo and program design as well as TV and radio ads.

OC Fair Radio also brought home a top award and OCFEC was honored for large-animal evacuation and for the new Ranch Discovery Days at The Ranch Community Center. OCFEC received one second-place design award.

“I am incredibly proud of the team here at OC Fair & Event Center and I am elated to see this industry recognition shine a spotlight on the work we do all through the year to provide wonderful experiences and service for the community,” said OCFEC CEO James Canfield.

Western Fairs Association sponsors annual awards programs to recognize excellence in the areas of competitive exhibits, communications and agriculture and to share successful ideas and programs with other fairs throughout the organization. More than 150 fairs throughout the Western U.S. and Canada are eligible to participate in this prestigious awards program.

The awards for 2025 achievements were announced following the organization’s annual conference last month in Reno.

OC Fair is the top fair in California and number nine in North American based on attendance. The 136th annual Fair will run this year from July 17 through Aug. 16.

What’s happening at OC Fairgrounds in February

Discovery Day at the Farm, Feb. 4

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crop education

When: Wednesday, Feb. 4, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit 
Discovery Day

Make It, Take It – Sweet & Simple Food Preservation and Body Care, Feb. 7

Learn safe, science-based food preservation techniques while creating a maple walnut syrup and two handmade body scrubs that are perfect for enjoying or gifting this Valentine’s season.

When: Saturday, Feb. 7, 9:30 a.m. – 12:30 p.m.; RSVP by Jan. 31
Where: OC Fair & Event Center – Centennial Farm Silo Building
How much: $45 class fee covers ingredients, handouts and two canning jars with lids and rings. Knives will be provided, but you may bring your own if preferred. Aprons are highly recommended. Tied-back hair and closed-toe shoes are required.
Refund policy: No refunds for cancellations made within seven days of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes

Ranch Discovery Day, Feb. 11

Saddle up for Ranch Discovery Day and experience an educational adventure all about horses and more! The Ranch will come alive with horses, livestock and interactive demonstrations, creating a memorable day for visitors of all ages!

What to expect:

  • Meet horses, chickens and rabbits
  • Explore horse care and grooming
  • Learn about horses in the military
  • Discover the world of bees
  • Stick horse rodeo activity for kids
  • Watch horse demonstrations
  • Check out our horse boarding areas including box stalls, arenas and other amenities

When: Wednesday, Feb. 11, 9 a.m. – noon 
Where: OC Fair & Event Center – The Ranch Community Center
How much: Free admission and parking.
More info: Reservations required, visit Ranch Discovery Day

Fight Club OC, Feb. 12

The most fun you can have on a Thursday night in Orange County! Boxing and MMA fights are presented by Roy Englebrecht Promotions.

When: Thursday, Feb. 12
Schedule:
Baja Bar & Grill happy hour, 5:30 – 6:30 p.m.
Hangar doors open at 6 p.m.
First fight starts at 7 p.m.
Where: OC Fair & Event Center – The Hangar
How much: General admission varies. Parking is $15.
More info: Visit Fight Club OC

Dinosaur Adventure, Feb. 14 – 15

Step into the world of prehistoric giants at Dinosaur Adventure, a unique exhibit showcasing life-sized, realistic dinosaurs that move and roar just like the real thing!

When: Saturday & Sunday, Feb. 14 -15
Schedule:
Saturday, Feb. 14, 9 a.m. – 8 p.m.
Sunday, Feb. 15, 9 a.m. – 7 p.m.
Where: OC Fair & Event Center – Anaheim Building, Los Alamitos Building
How much: General admission for guests 13+ is $27, $37 for children 2-12. Children under 2 are free. Parking is $15. 
More info: Visit Dinosaur Adventure

Gem Faire, Feb. 20 – 22

The largest jewelry and bead show in SoCal. Fine jewelry, precious and semi-precious gemstones, millions of beads, crystals, gold and silver, pearls, minerals, fossils and much more at manufacturers’ prices. Jewelry repair, cleaning and ring sizing while you shop.

When: Friday – Sunday, Feb. 20 – 22
Schedule:
Friday, Feb. 20, noon – 6 p.m.
Saturday, Feb. 21, 10 a.m. – 6 p.m.
Sunday, Feb. 22, 10 a.m. – 5 p.m.
No entry or re-entry after 4 p.m. on Sunday, Feb. 22.
Wholesale preview on Friday, Feb. 20, from 10 a.m. to noon.
Where: OC Fair & Event Center – Costa Mesa Building, Main Mall, Santa Ana Pavilion
How much: General admission is $7, children 11 and under are free. Parking is $15.
More info: Visit Gem Faire

Sow and Grow! Seed Starting from Scratch, Feb. 21

Learn how to confidently start seeds at home and grow strong, healthy seedlings in this hands-on class led by local gardener Kylie Gilliam.

When: Saturday, Feb. 21, 10 a.m. – 12:30 p.m.; RSVP by Feb. 13.
Where: OC Fair & Event Center – Centennial Farm Silo Building
How much: $35 fee covers all materials, including a small container box, soil, seeds and instructional resources.
Refund policy: No refunds for cancellations made within seven days of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes

Repticon, Feb. 21 – 22

This show features everything that you’ve come to love most about Repticon’s two days of fun and excitement! See live animals from around the world, purchase pets and pet products direct from the experts at amazing prices you won’t find anywhere else and learn more about reptiles and exotic animals. Repticon Costa Mesa is one reptile and exotic animal expo that you can’t afford to miss!

When: Saturday – Sunday, Feb. 21 – 22
Schedule:
Saturday, Feb. 21, 9 a.m. – 4 p.m.
Sunday, Feb. 22, 10 a.m. – 4 p.m.
Where: OC Fair & Event Center – Huntington Beach Building
How much: Adult general admission is $15, $7 for children. Adult two-day super tickets are $20, $7 for kids. Parking is $15.
More info: Visit Repticon Reptile Show

Discovery Day at the Farm, Feb. 26

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crop education

When: Thursday, Feb. 26, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

OC Fair Board of Directors Meeting, Feb. 26

When: Thursday, Feb. 26, 9:30 a.m. 
Where: OC Fair & Event Center Administration Building or virtually on Zoom.
More info: Visit Public Meetings

California Bridal & Wedding Expo, Feb. 28

Bridal & Wedding Expo features an amazing selection of wedding professionals ready to help you find the perfect gown, reception venue, invitations, photographer, music, menu, honeymoon destination and much more!

When: Saturday, Feb. 28, 11 a.m. – 5 p.m.
Where: OC Fair & Event Center – Costa Mesa Building
How much: Free passes available online. $10 general admission at the door. Parking is $15.
More info:
Visit CA Bridal & Wedding Expo
Interested in exhibiting:
Visit CA Bridal & Wedding Exhibitors

Homegrown Tomatoes, Feb. 28

Discover the secrets to growing delicious, nutrient-packed tomatoes at home with expert tips on planting, care and maximizing your harvest!

When: Saturday, Feb. 28, 10 a.m. – noon.; RSVP by Feb. 25.
Where:
OC Fair & Event Center – Centennial Farm Silo Building
How much:
$7 fee covers handouts.
Refund policy: 
No refunds for cancellations made within 48 hours of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: 
Sign up at Centennial Farm Garden Classes

IBJJF Orange County Winter 2026, Feb. 28 – March 1

Series of Brazilian jiu-jitsu matches. Watch as these athletes grapple while demonstrating their discipline for and dedication to the sport of Brazilian jiu-jitsu.

When: Saturday – Sunday, Feb. 28 – March 1, 8 a.m. – 7 p.m.</br /> Where: OC Fair & Event Center – The Hangar
How much: General admission is free. Parking is $15. 
More info: Visit OC Winter International Open


Ongoing at OC Fair & Event Center

Centennial Farm

Centennial Farm is home to fruit and vegetable gardens, livestock and the Millennium Barn. Two youth educational tour programs are offered – Discovery Days and Jr. Farmer Tours – as well as daily hours so the public can visit our year-round working farm. 

When: Monday – Friday, 1 – 4 p.m.; Saturday & Sunday, 10 a.m. – 4 p.m. Excluding holidays and all-grounds events; see calendar for closures.
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Centennial Farm

Farmers Market

Shop local at this OC Farm Bureau-certified farmers market featuring produce, fish, hummus, honey, hot sauce and more. Some vendors also sell hot food for lunch, such as dumplings, burritos and more.

When: Thursdays, 9 a.m. – 1 p.m.
Where: OC Fair & Event Center – Lot D
How much: Free admission and parking.
More info: Visit OC Farm Bureau 

Heroes Hall

Heroes Hall is a free, permanent, year-round museum and education center with exhibitions, performances and educational programs that celebrate the legacy of Orange County veterans and others who have served our nation. The two-story exhibition space will rotate themes with each focusing on an aspect of the personal stories and experiences of veterans.

The current exhibit, “Echoes of Conflict: Remembering Vietnam,” offers a powerful and immersive journey through one of modern history’s most complex and divisive conflicts. Through a rich collection of artifacts, personal stories, historical facts and poignant memorabilia, visitors will gain a deeper understanding of the war’s profound impact on the soldiers who fought and the broader global context. On display through Sept. 20.

The SAAAB Story is Heroes Hall’s permanent exhibit highlighting the WWII-era training center that once occupied the land where the OC Fairgrounds now stands. The refreshed exhibit is now open with new artifacts, memorabilia and stories to explore.

When: Wednesday – Sunday, 10 a.m. – 4 p.m. Excluding holidays and all-grounds events; see calendar for closures.
Where: OC Fair & Event Center – Heroes Hall Museum & Education Center
How much: Free admission and parking.
More info: Visit Heroes Hall

The Ranch Community Center

The Ranch Community Center celebrates horses, ranching and nature. Free or low-cost public programs are offered, including The Ranch Discovery Days, The Ranch After-School Program, horse shows and equine-assisted therapy. Visitors can connect with the equestrian community year-round during daily hours.

When: Monday – Friday, 8:30 a.m. – 5 p.m.; Saturday, 8:30 a.m. – 12:30 p.m.
Closed Sundays and select holidays.
Where: OC Fair & Event Center – The Ranch Community Center
How much: Free admission and parking.
More info: Visit The Ranch

Centennial Farm Pig Cam

Want to keep tabs on our pigs all year long? Watch the Centennial Farm pigs LIVE on our official Pig Cam and see what these adorable rascals are up to!

More info: Visit Centennial Farm Pig Cam


Pacific Coast Sportfishing Show, March 5 – 8

Southern California’s largest fishing tackle, boat, travel and outdoors show returns for its 16th year. Explore eight halls and 250,000 square feet of saltwater and freshwater fishing tackle, boats, travel destinations and everything outdoors. Families and children are welcome. Enjoy bands, activities and a free kids catch-and-release trout pond.

When: Thursday – Sunday, March 5 – 8
Schedule:
Thursday – Friday, March 5 – 6, noon – 7 p.m.
Saturday, March 7, 10 a.m. – 7 p.m.
Sunday, March 8, 10 a.m. – 5 p.m.
Where: OC Fair & Event Center – All Fairgrounds
How much: General admission is $20, active duty military and children 12 and under are free. Parking is $15.
More info: Visit Pacific Coast Sportfishing

Discovery Day at the Farm, March 6

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crops education

When: Friday, March 6, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

Scraps to Soil: Build Your Own Worm Compost Bin, March 21

Turn everyday kitchen scraps into nutrient-rich compost with the help of hardworking worms. This hands-on class will help participants feel confident venturing into vermiculture while building a simple mini worm bin to take home.

When: Saturday, March 21, 10 a.m. – noon.; RSVP by March 14.
Where:  OC Fair & Event Center – Centennial Farm Silo Building
How much: The class fee is $25 for adults and $5 for children ages 17 and under. All materials needed to create a mini worm compost bin during the class, including worms, are provided. Participants are encouraged to bring a pair of garden gloves.
Refund policy: No refunds will be issued for cancellations made within seven days of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes

Discovery Day at the Farm, March 24

Discovery Days at Centennial Farm are open to the public and are perfect for parent groups, homeschool groups and more. Groups may participate in the following activities:

  • Self-guided tours
  • Radish seed planting
  • Chick education
  • Oxen demonstration
  • Crops education

When: Tuesday, March 24, 9 a.m. – noon
Where: OC Fair & Event Center – Centennial Farm
How much: Free admission and parking.
More info: Visit Discovery Day

OC Fair Board of Directors Meeting, March 26

When: Thursday, March 26, 9:30 a.m. 
Where: OC Fair & Event Center Administration Building or virtually on Zoom.
More info: Visit Public Meetings

Citrus for Southern California Gardens: Choosing, Growing and Caring for Trees, March 28

Whether you are planting your first citrus tree or looking to improve the health and productivity of established trees, this informative class led by Isabel Barkman provides practical, region-specific guidance. Participants will learn how to select citrus varieties best suited for Southern California, understand rootstocks and tree size and apply best practices for planting, watering, fertilizing, mulching and pruning. The class also covers seasonal care, common pests, diseases and tips for keeping citrus trees productive year after year. This lecture-based class is designed to build confidence and help gardeners make informed decisions for long-term citrus success.

When: Saturday, March 28, 10 a.m. – noon.; RSVP by March 25
Where:  OC Fair & Event Center – Centennial Farm Silo Building
How much: $7 fee covers materials and any handouts.
Refund policy: No refunds will be issued for cancellations made within 48 hours of a class. For cancellations made prior, only the class fee will be refunded. Booking fees are nonrefundable.
More info: Sign up at Centennial Farm Garden Classes