Granite Hills High School, established in 1999, is one of the eleven high schools in Porterville, Tulare County, California. Jacob Bowker is the principal. A previous principal was Apolinar Marroquin.
Its online newspaper, the Grizzly Gazette, was a top million finalist in the National Scholastic Press Association Pacemaker Competition in the 2005âÂÂ06 school year and were winners the following two years.----
The Granite Hills Academic Decathlon team won the Tulare County Academic Decathlon Regional Championship for the 6th consecutive year.
The school's girls soccer team forfeited a game in 2022 because of the other team included a transgender athlete.
The school offers an "Academy of Law Justice and Ethics" program. In 2022, students from the school's Academy of Law Justice and Ethics investigated a simulated murder scene
In 2018, a student stabbed himself.