VIew of the Palace of Education, which was the New Mexico State Building during the 1915 exposition and is now the Balboa Park Club. The California Pacific International Exposition was held May - November 1935 and February - September 1936. It was held in Balboa Park, which had also been the site of the earlier Panama-California Exposition in 1915. The Exposition was held to promote San Diego and support its economy and had hundreds of exhibits on history, the arts, horticulture, ethnic cultures, science, and industry.