Grossmont High School is a public high school located in La Mesa, California. Established in 1920, it is part of the Grossmont Union High School District. The school serves students in grades 9 through 12 and offers a variety of academic programs, including Advanced Placement (AP) courses and vocational training. The campus features modern facilities, including science labs, a library, and athletic fields. Grossmont High School is known for its diverse student body and active extracurricular programs, such as sports, music, and clubs, which encourage student engagement and community involvement.