The Intercollegiate Rowing Association (IRA) governs intercollegiate rowing between varsity men's heavyweight, men's lightweight, and women's lightweight rowing programs across the United States, while the NCAA fulfills this role for women's open weight rowing. It is the direct successor to the Rowing Association of American Colleges, the first collegiate athletic organization in the United States, which operated from 1870–1894. The IRA National Championship is the oldest college rowing championship in the United States.