Carlsbad High School is a public High School in Carlsbad, California. First opened in 1957, the high school underwent major redevelopment from 2009 to 2012. Located in Carlsbad, San Diego, California, a suburb of San Diego, Carlsbad High School was built in 1957. The school is renowned for its high level of academic success and graduate levels, with top students from each year attending many of the most prestigious universities in the United States. The SAT average for 2009 seniors was 1022, or 541/section. (Note, only 57% of the seniors took the SAT on record). The mean ACT score was a 24, with a 16% participation rate among seniors.