The Carter Barron Amphitheatre is a 4,000-seat outdoor performance venue in Washington, D.C., U.S. Located in Rock Creek Park, the amphitheatre opened in 1950 in honor of the 150th Anniversary of Washington, DC as the nation's capital. The National Park Service operates Carter Barron, offering a variety of quality performances, including reggae, Latin, classical, gospel, musicals, pop, R&B, jazz, new age, theater, and dance. Many of the performances are provided free of charge. The adjacent William H. G.