Established in 1966, El Dorado is one of four high schools in the Placentia-Yorba Linda Unified School District, and serves the northern parts of Placentia, and Yorba Linda far eastern Fullerton, (east of the 57 freeway), and a small portion of Brea.

The EDHS gymnasium is dedicated to Joe Raya, a former Athletics department staff member.

[citation needed] The school is home to the El Dorado Golden Hawks Marching Band; the band's past achievements include a performance in the Sydney Olympics Opening Ceremony, the Tournament of Roses Parade and top honors in two trips to the Hawaii International Competition.

[citation needed] The band has performed in Canada, Florida, Hawaii, and Nevada, as well as at the 2000 Sydney Olympics and 2005 and 2010 Tournament of Roses Parade.

Also, the drumline and color guard performed in the opening ceremonies for the 2011 Tournament of Roses Parade.