Plans were made in 1924 to make a separate high school in Brea;[3] some parents pushed back and insisted that their children remain at Fullerton Union High School.

[4] Construction commenced in 1926; despite some shortcomings by the original contractor, the $400,000 project was finished in time for the 1927–1928 school year.

The new school location would not include a working farm as part of Future Farmers of America (FFA).

[9] The girls basketball team has won ten CIF State Championships.

[10] Brea Olinda fields four competitive show choirs: the mixed-gender "Masquerade", the all-female "Spellbound" and "Tiffanys", and the all-male "Thundercats".