A free national fair called the Great American State Fair will open on the National Mall in Washington, D.C., on June 25, 2026, and run through July 10. The event is organized under Freedom 250 and listed among the official USA 250th anniversary programs coordinated by the National Park Service.

The fair will stretch from the U.S. Capitol to the Washington Monument — roughly 1.9 miles across federal parkland. It will feature more than 150 exhibits, with no cost to attend.

A corridor that long requires coordination between multiple federal agencies: the National Park Service, Capitol Police, Secret Service, and the National Capital Planning Commission. They'll need to manage access, security, and where vendors set up across the entire stretch. The scheduling puts July 4th squarely in the middle of the fair, which means the holiday crowds and the fair crowds will overlap — concentrating visitors and media attention in one event rather than spreading it across separate ceremonies.

The state-by-state format draws from the tradition of world's fairs and similar state showcases last seen at scale during the 1976 Bicentennial. Washington.org's event listing describes it as a national exposition.

The National Park Service's formal inclusion of this event in its USA 250 programming matters for how the fair operates. It gives Freedom 250 federal coordination resources and potentially broader audience reach than a purely private event renting space on the Mall would receive. Available reporting does not confirm whether Congress approved specific funding for Freedom 250 programming or whether the Park Service role is mainly coordination.

A 16-day fair is unusual for the National Mall. Most large events there last hours or a weekend. Running two and a half weeks requires a different permitting and operations approach. It positions the fair to draw both the July 4th holiday visitors and the summer tourism wave that typically extends through mid-July in the capital. With more than 150 exhibits, the organizers will face a real test in pulling off programming at that scale.