Montclair High School Home

About Us

The Chaffey Joint Union High School District serves the communities of Ontario, Montclair, Rancho Cucamonga, and portions of Fontana, Upland, Chino, and Mount Baldy. With over 25,000 students, the District is the fourth largest high school district in California. It has eight comprehensive high schools, a continuation high school, an online high school, a community day school, an adult school, and alternative programs. The District offers a wide variety of instructional options that provide a quality education for each student, every day. The District's well-prepared, dedicated, and highly qualified teachers and support personnel are second to none.
The Chaffey Joint Union High School District Board of Trustees are steadfast in the belief that "Nothing is more important than student learning and their achievement."
Our daily purpose encompasses our commitment:
"To provide student learning, and ultimately their achievement, of the prescribed curriculum that takes place in the classroom under the direction of the teacher." The Chaffey District supports this daily act. We realize that our efforts uniquely influence the future of our community and of this nation, and we are passionate about doing whatever it takes to prepare students to be successful and contributing citizens of the 21st century.
The Chaffey District has provided a quality education for high school students in the area since 1911. As the District continues to grow and progress, we are poised to meet the challenge of providing the finest quality education possible for every student. 
About Us Image
All CJUHSD students will graduate ready for college and careers.

Recent News

WeTip - Be the solution


Be the Solution. If you have information regarding crime or misconduct at your school, call WeTip anonymously.

The Chaffey District Cares

The Chaffey District cares about your mental well-being. We partner with community agencies and mental health professionals to provide support to our students and staff. If you, or someone you know, is in crisis please contact the Community Crisis Response Team (909) 421-9233 - Click 'Read Full Story' for more information.

Upcoming Events

School Facts

  • 69% of Montclair High School graduates meet the University of California and California State University A-G admissions requirements, making it a leader in San Bernardino County.
  • 88% of freshmen at Montclair High School complete their first year of high school on track to graduate.
  • The CJUHSD has been named a Top Workplace by the Press-Enterprise and Inland News Group.
  • 1000 Advanced Placement exams are administered to students at Montclair High School annually.

Principal's Message

Mr. Cho
Dear Montclair Cavaliers,
Welcome to the upcoming 2022-2023 school year! I hope that these summer months have allowed time for some rest and rejuvenation. We are excited for our students to return to campus for the first day of fall semester on Wednesday August 10, 2022, and we are confident that the new school year will be rewarding for them, both academically and socially.
Families should be receiving the summer mailer packet in early July. Our families are now able to complete their annual Aeries Summer Data Confirmation documents online (what was previously included in the summer mailer packet). Please click on here for more information. 
*Please note, in order for students to pick up class schedules during Spirit Day, this information must be completed Prior to the event*
Please see below for our Spirit Day Schedule:
●      12th grade - Monday, July 25, 2022 (8:00 AM to 11:30 AM)
●      11th grade - Tuesday, July 26, 2022 (8:00 AM to 11:30 AM)
●      10th grade - Wednesday, July 27, 2022 (8:00 AM to 11:30 AM)
●      9th grade - Thursday, July 28, 2022 (8:00 AM to 11:30 AM and 1 PM to 3:00 PM)
●      Makeup Day - Friday, July 29, 2022 (8:00 AM to 11:30 AM)
For our incoming 9th graders, our Link Crew will provide Freshman Orientation and it will take place on August 4 (Last Name A - L) and August 5 (Last Name M - Z) from 8 AM to 12 PM in the Big Gym. Additional information will be included in the summer mailer.
I am so honored to serve as your principal, and I cannot wait to meet everyone on campus soon. Here’s to a great school year. Go, Cavs!
Proud Principal of Montclair High School,
Joshua Cho