Fairplex, formerly known as the Los Angeles County Fairgrounds prior to 1984, has been the home of the L.A. County Fair since 1922. It is located in the city of Pomona, California. The L.A. County Fair is now held during the month of September, 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.
Fairplex is owned by the Los Angeles County, but is leased to and is governed by an independent, self-supporting non-profit organization, the Los Angeles County Fair Association, which manages and produces the county fair and re-invests surplus revenues generated by the fair and other events in the maintenance and development of the facility.
Having begun in 1922 with 43 acres (170,000 m2) donated by the City of Pomona, the Fairplex grounds now cover 543 acres (2.2 km2) and include nearly 325,000 square feet (30,200 m2) 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 Fairplex are various scenic parks, plazas and picnic areas, a historic train exhibit, and 12 acres (49,000 m2) of carnival grounds.
Most of the livestock and small stock shows during the county fair including 4-H competitions have been dismantled and the buildings allowed to deteriorate. Once a prestigious livestock show with show horses, cattle, swine, goats, sheep, poultry, and rabbit competitions., the management decided to stop funding this historic aspect of the fair much to the disappointment of the region's livestock community. The management hired a decorator to attach faux barn and country scenes to the show buildings. In place of 4-H kids and their projects, management rents petting zoo animals. The management has taken the further step to discontinue allowing any such shows during the off season. Many historic local clubs and associations were displaced with not having a safe venue for their events as they had for over 50 years.
The RailGiants Train Museum is owned and maintained by the Southern California Chapter of the Railway & Locomotive Historical Society, and until November 2013 was the home to one of the world's largest steam locomotives, Union Pacific Big Boy 4014, which has been acquired by the Union Pacific Railroad and was moved to Cheyenne, Wyoming for a multi-year restoration that will return 4014 to operation.