John Muir High School is a four-year comprehensive secondary school in Pasadena, California, United States and is a part of the Pasadena Unified School District. The school is named after preservationist John Muir.HistoryThe school's buildings were originally a part of John Muir Junior College . The junior college merged with Pasadena City College, and converted to a two-year high school in the Fall semester of 1954. It later become a full four-year high school, located on Lincoln Avenue in northwest Pasadena.Prior to 1964, many white students from the community of La Canada Flintridge, California joined those from the black neighborhood of northwest Pasadena and the racially mixed community of Altadena, and enrollment was nearly 3,000 students. In 1963, La Canada Flintridge, California built its own high school and removed its students, except for those who would graduate in 1964. Shortly after that, the Pasadena City School District created Blair High School, siphoning off another large portion of the school's population.