Fairplex

The L.A. County Fair is held during the month of May since 2022, but the facility is used year-round to host a variety of educational, commercial, and entertainment such as trade and consumer shows, conventions, and sporting events.

Among other features of the Fairplex are various scenic parks, plazas and picnic areas, a historic train exhibit, and 12 acres (49,000 m2) of carnival grounds.

[6] The Fairplex is home to a large dragstrip known as the Auto Club Raceway at Pomona, which hosts both the opening and closing rounds of the NHRA drag racing series.

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.

[9] During World War II, the Los Angeles County Fairgrounds was the site of one of several temporary detention camps (also known as assembly centers) located throughout the West.

Pursuant to Executive Order 9066, signed by President Franklin D. Roosevelt on February 19, 1942, fifteen makeshift detention facilities were constructed at various California racetracks, fairgrounds and labor camps.

These facilities confined Japanese American citizens until permanent location centers such as those in Manzanar and Tule Lake in California could be built in more isolated areas of the country.

Beginning on March 30, 1942, native-born American citizens and long-time legal residents of Japanese ancestry living in California were ordered to surrender themselves for detention.

The facility features a Metrolink platform on the north side of the property, where San Bernardino Line trains provide passenger services on fair days.

[12] Los Angeles County operates a free Park and Ride facility for commuters adjacent to the grounds at 1810 Gillette Road with 553 spaces available.