Rancho Cucamonga High School (RCHS)Rancho Cucamonga High School was opene in the fall of 1992 to roughly 1,500 students. The school opened with no senior class. The size of the school has grown along with the population of Rancho Cucamonga. In 2002, RCHS housed 3090 students, but with the opening two new high schools within the district, the overflow pressure of students was relieved. Currently, there are approximately 2,800 students enrolled at RCHS.