History
Prior to 1955, all high school students in the Alta Loma, Cucamonga and Etiwanda Elementary School Districts received high school education at Chaffey High School in Ontario. With the opening of Upland High School in 1955, most of these students attended Upland High for high school studies. In the early 1960's rapid housing growth in the Alta Loma, Cucamonga, and Etiwanda areas created the need for a new high school. [3] The Chaffey Union High School District issued bonds for construction of the new school located on farmland along the north side of Baseline Road just east of Carnelian Street in Alta Loma. A contract for construction was issued to Berry Constuction of Ontario, with groundbreaking in March of 1962. The primary construction was completed in July of 1963 at a cost of $2.38 million. [4] The freshman, sophomore, and junior classes of 1967, 1966, and 1965 respectively entered in the fall of 1963, with a formal dedication on November 19, 1963 (the senior class was allowed to finish at Upland High School with the class of 1964). [5] , [6]
With funding received from state bonds, expansion work was done between 1998 and 2001, adding on a new Math and Science building, a new dance studiho,t weight rooms, and a new library, along with renovation work on sites around the campus. On March 13, 2025, the mascot changed from the Braves to the Lions.
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