The Orange County Great Park stands as a significant civic and recreational endeavor within Irvine, occupying a substantial portion of the former Marine Corps Air Station El Toro. It is conceived as a central park for Orange County, a public space offering diverse amenities and acting as a cornerstone for community gathering and regional recreation. Its existence is a testament to a long-term vision for urban planning and the transformation of military land into a public asset.

The park's history is rooted in the decommissioning of Marine Corps Air Station El Toro, which ceased operations in 1999. The future of the nearly square miles of land became a subject of intense public debate. Initial proposals included the development of a large commercial airport, a concept that met with considerable opposition from many Orange County residents, particularly those in surrounding cities concerned about noise and traffic. Following years of discussion and campaigning, voters ultimately decided the land's fate through Measure W in 2002, which mandated the creation of a great metropolitan park instead of an airport. The City of Irvine then successfully acquired the former base land through a public auction from the Navy in 2005, paving the way for the park's development. Early ambitions for the park envisioned a sweeping design by landscape architect Ken Smith, though elements of that initial master plan have since evolved considerably through phased implementation and revised funding strategies. The development of the Great Park has also been intricately linked with surrounding residential and commercial development by FivePoint, which acquired significant portions of the former base land to fund park construction through a public-private partnership. This approach has shaped the park's ongoing expansion and the specific amenities it offers today.

Today, the Great Park features a broad array of facilities that serve both local residents and regional visitors. Perhaps its most recognizable feature is the Great Park Balloon, a tethered helium balloon that ascends hundreds of feet, offering panoramic views of Irvine and the broader Orange County landscape on clear days. Adjacent to the balloon, the Great Park Sports Complex is a sprawling, multi-field facility that includes numerous soccer fields, baseball diamonds, and softball fields, along with tennis courts and sand volleyball courts. A championship soccer stadium within the complex hosts professional and collegiate matches, cementing the park's role as a major sports destination. Beyond active recreation, the Palm Court Arts Complex offers gallery space and artist studios, while Hangar 244, a renovated military hangar, serves as an event venue and features historical exhibits related to the former air base. The Great Park Farm + Food Lab provides educational opportunities focusing on sustainable agriculture, with demonstration gardens and programs for children and adults. Other popular amenities include the Kids Rock Playground, extensive walking and biking trails, picnic areas, and various open green spaces.

The Great Park serves a multitude of uses, acting as a vibrant hub for community life and a significant regional attraction. Its sports facilities are in constant use for youth leagues, adult recreational play, and large-scale tournaments, drawing teams and spectators from across Southern California. Families utilize the park for picnics, playground visits, and leisurely strolls along its pathways. The Farm + Food Lab engages visitors with hands-on learning about gardening and food production, fostering an appreciation for local agriculture. Throughout the year, the park hosts a variety of events, including farmers markets, seasonal festivals, concerts, and cultural performances, transforming its grounds into dynamic public gathering spaces. The Great Park Balloon remains a popular attraction, providing a unique perspective on the city's growth and the surrounding natural beauty.

Visitors to the Orange County Great Park should be aware of its expansive nature. The park's numerous attractions are spread across a wide area, meaning that walking distances between different features can be considerable. Planning transportation within the park or focusing on a specific section for a visit can enhance the experience. Ample parking is available, but during large events, sections may become congested. Given the open layout of many areas, particularly the sports fields and event lawns, appropriate sun protection, such as hats and sunscreen, is advisable, along with carrying sufficient water. The operation of the Great Park Balloon is always contingent on weather conditions, and it is subject to temporary closures due to wind or other factors. Prospective visitors may benefit from consulting the park's activity schedules beforehand to learn about specific events, programs, or operational details for attractions like the balloon, ensuring they can make the most of their time at this continually developing public space.