California Youth Symphony is a San Francisco Bay Area symphony orchestra for young musicians of high school age and younger. It was founded in 1952 by Aaron Sten and in 1963 became the first United States youth orchestra to tour abroad, performing twelve concerts in Japan. Since then, the orchestra has toured Mexico, Australia, and several countries in Europe and Asia. In 1994, the orchestra placed first in the International Youth and Music Festival Competition in Vienna. The orchestra has also collaborated with youth orchestras in Japan and in Switzerland. Leo Eylar has been musical director since 1990. The California Youth Symphony Senior Orchestra's Concertmaster is currently Helen Wu.