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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. 
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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

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Montclair Cavaliers,
Happy New Year and welcome to the start of second semester! We look forward to an exciting and successful term, and I hope that you are ready to begin school with a renewed sense of purpose in pursuing your studies. It is important to start the new semester on the right track, so I encourage everyone to set goals to be diligent in maintaining engagement in every class and in consistently communicating with our teachers. 
Some of you may have been or continue to be impacted by COVID-19, and it appears the Omicron variant has spread quickly in our region. Thankfully, typical symptoms seem to be less severe in most cases when compared to previous strains. In any case, students should remain at home if experiencing any COVID-related symptoms or if they are unvaccinated and recently been in close contact with someone who is COVID positive.
As a reminder, school is not in session on the following dates: 

January 17th – MLK JR. Day 
February 14th – Lincoln’s Day 
February 21st – Presidents Day 
March 21st - 25th – Spring Break  
The winter period is a busy time on our academic calendar. I encourage everyone to utilize the various communication platforms – Canvas, all calls, school website, Twitter, Remind, and others to stay in touch with Montclair announcements and happenings. You can always contact the school office directly for information as well. 
Here is to a great 2022!
Your proud principal,
Joshua Cho