Having begun in 1922 with donated by the City of Pomona, the Fairplex grounds now cover and include nearly of indoor exhibit space. Slightly less than half of the grounds are given over to paved parking areas to accommodate 30,000 vehicles. Among other features of the Fairplex are various scenic parks, plazas and picnic areas, a historic train exhibit, and of carnival grounds.
Railways The
RailGiants Train Museum is owned and maintained by the Southern California Chapter of the Railway & Locomotive Historical Society. The museum operates the
Fairplex Garden Railway. It has over 80 volunteers and from November through July, runs the second Sunday of every month, from 11:00am to 4:00pm, for the general public. The FGRR gears up every year for the L.A. County Fair, its primary show. In December various members run their Christmas trains. The garden railroad uses
G Scale trains.
Barretts OTB, sales, and closed race facilities There is a large
off-track betting (OTB) horse wagering racebook at the Fairplex, located on White Avenue, about a mile north from McKinley Avenue in Pomona. The OTB accepts racing signals from the United States, Canada, and Australia. There is also a restaurant and Sports Bar called The Derby Room. Next to the OTB is
Barretts Sales and Racing, a horse facility with a (now closed) 5/8 mile racetrack and a grandstand seating 10,000. Barrett's provided equine training facilities, horse show facilities, and the Barrett's Equine Limited horse auction complex. The grandstand facility is also used to host concerts and special events accommodating up to 15,000 patrons. Barrett's and the Los Angeles County Fair Association reached an agreement in February 2013 for naming rights, and the race meet was referred to as the "Barrett's Race Meet at Fairplex." In addition to horse races, the track hosted the final round of the
American Flat Track motorcycle racing series in 2009 and from 2011 to 2014. The Fairplex is home to a
large dragstrip known as the
In-N-Out Burger Pomona Dragstrip, which hosts both the opening and closing rounds of the
NHRA drag racing series. The Fairplex is also the location of the
Wally Parks NHRA Motor Sports Museum, presented by the
Automobile Club of Southern California. The Fairplex is the site of the Millard Sheets Center for the Arts at Fairplex, a year-round education and exhibit space affiliated with
The Smithsonian Institution. The center is located in the historic Fine Arts building, a facility designed by architect
Claud Beelman and erected by the
WPA in 1937. In 1994 the building was renamed in honor of artist
Millard Sheets, a Pomona native who was the director of the county fair's art programs from 1930 to 1956.
RV park From 2015 through 2017, the Fairplex became the subject of news and investigation by the Los Angeles Times for the improper collection of taxes from Fairplex RV Park residents, as well as its neglect of the RV park grounds, which resulted in issues with bed bugs and roaches as well as infrastructure problems that include damaged roads and walkways, bathrooms in disrepair, inadequate plumbing and electrical fixtures. In 2017, in a separate article written by the Los Angeles Times, the Los Angeles Fair Association agreed to a $325,000 settlement with the residents of the Fairplex RV Park. The settlement agreement allowed at least 475 people to be reimbursed for improper collection of taxes. Unfortunately, due to the law that provides a legal right to recover improperly collected taxes, residents were only able to file for reimbursement as far back as four years prior to the 2015 lawsuit, leaving some residents unable to request reimbursement for taxes collected prior to that date. Within the aforementioned article, it has also been reported that the Association has spent $250,000 on renovations of public bathrooms and showers, and calls for more transparency of the Los Angeles Fair Association by the public and the City of Pomona.
Knight Riders Cricket Ground The
Los Angeles Knight Riders will play at a cricket field in Fairplex, the
Knight Riders Cricket Ground as of the
2026 Major League Cricket season. In April 2025, the Fairplex was announced as the venue for
Cricket at the
2028 Summer Olympics. ==Pomona Assembly Center==