The first formal athletic league involving eventual Ivy League schools (or any US colleges, for that matter) was created in 1870 with the formation of the Rowing Association of American Colleges. The RAAC hosted a de facto national championship in rowing during the period 1870–1894. In 1895, Cornell, Columbia, and Penn founded the Intercollegiate Rowing Association, which remains the oldest collegiate athletic organizing body in the US. To this day, the IRA Championship Regatta determines the national champion in rowing and all of the Ivies are regularly invited to compete.A basketball league was later created in 1902, when Columbia, Cornell, Harvard, Yale, and Princeton formed the Eastern Intercollegiate Basketball League; they were later joined by Penn and Dartmouth.