Los Altos High School is a wide-ranging four-year public education high school located in the bedroom community of Hacienda Heights, California, which is situated in eastern Los Angeles County.

The school was established in 1958 originally as the second of seven high schools in the former La Puente Union High School District. It is now one of 4 high schools in the Hacienda La Puente Unified School District, which was created in the year 1970 by a vote of the electorate unifying four high schools and the Hudson Elementary School District.

Notable alumni of the school are as follows:

Joe Kay - DJ, radio host, as well as founder of Soulection, a record label /platform / radio show/culture

Michael Smith - former All-America basketball player at BYU as well as first-round pick of the Boston Celtics (13th overall), current television and color announcer for Los Angeles Clippers.[6]

Troy Tanner – is former member of the national men's volleyball team, which played at the Seoul Olympic Games in the year 1988.

Shaun Cody – is former USC Trojan Star, current NFL free agent .

Travis Brown - is former New Mexico Lobo standout (2x 1st Team All-MWC) and NFL Football Player (St. Louis Rams)

Renae Cuéllar - is former player for Mexico Women's National Football Team.

Edie Robinette-Petrachi - Actor, Singer, Writer, Film as well as TV Producer and Director (Class of 1977).