Southridge opened in 1999 due to overcrowding at other high schools in the Beaverton SD. SRHS was constructed with the help of a $146 million bond approved in 1996. Southridge opened to grades 9–11 with an initial enrollment of 1,236. 12th grade was added the following year. Southridge's first principal was Sarah Boly. The school offers
International Baccalaureate programs and a large number of
Advanced Placement courses. == Athletics ==