Despite turning 90 in late September 2010, the school that is one-third in La Mesa and two-thirds in El Cajon has…More many elements of newness, including a Science Building erected with Proposition H funds overlooking an all-weather track and artificial-grass football field. It was named a California Distinguished School in 2008, and its alumni include three astronauts, several major league baseball players and an Olympic javelin thrower.
In sports, Grossmont's strongest tradition is in baseball — its varsity team having won section titles four straight years (2005-2008). In the arts, the Red Robe Choir is renowned and has traveled around the world. Its Royal Blue Regiment marching band has performed in major parades.
The school has a PTO (Parent-Teacher Organization) and operates under the umbrella of the Grossmont High School Education Foundation.