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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

Upcoming Events

Board Meeting

Time: 5 PM – 8 PM
Location: Rancho Cucamonga High School

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

Portrait of Lino Gomez
Cavaliers!
 
Can you believe it? The 4th quarter is here!
 
Montclair Cavaliers, you have put in an incredible amount of hard work this year, and I couldn’t be prouder!  But the journey isn’t over yet—now is the time to push forward, stay focused, and finish strong across the 4 As that define Montclair High School: Activities, Academics, Athletics, and the Arts.
 
The final stretch of the year is packed with opportunities to showcase your talents, celebrate your achievements, and see firsthand how Hard Work Pays Off.  Whether you are excelling in the classroom, competing on the field or court, performing on stage, or leading in student Activities, you continue to demonstrate that Excellence is a Habit at Montclair.  Through every challenge, you have proven that adversity is no match for the determination and resilience of our students in Academics, Athletics, the Arts, and student Activities.
 
As we look ahead, the excitement only builds!  From thrilling competitions and performances to academic milestones and senior celebrations, I can’t wait to witness the legacy our seniors will leave behind.  Let’s make this quarter one to remember in all 4 As, because at Montclair, we pursue excellence in every arena.  Let’s go, Cavaliers!
 
As we approach spring break and move into the month of April, please review the following information:
 
     • ELPAC Testing (Academics): March 23 – 27 and April 13 – 14

     • CAST Testing for Juniors/Seniors (Academics): March 24 – 26

     • Prom Rally (Activities): March 27

     • Spring Break: March 30 – April 3

     • CAASPP Testing for Juniors/Seniors (Academics): April 6 – 20

     • Prom (Activities): April 11
 
     • Renaissance Rally/Field Day (Activities and Academics): April 17

     • Senior Awards (Academic Excellence – families will be notified if selected): April 17

     • AP Testing (Academics): May 4 – May 15

     • Spring Season Athletics are underway! Come out and support our Cavaliers!

     • Be on the lookout for our Arts performances featuring Dance, Choir, Drama, and Band

     • Graduation: May 20
 
There is so much to pack in before school lets out across all 4 As!
 
Montclair, Stay on Track for Success!
 
At Montclair, we are committed to ensuring that All Students Graduate College and Career Ready—and that begins with strong Academics.  Staying on track with your A-G requirements is essential.  If you’ve received a D or F in any class, summer school is your opportunity to remediate, recover, and refocus on your path to success.
 
Summer School 2026 runs from May 27th to June 25th, offering two periods designed to help students get back on track academically.  Counselors will be reaching out to students who need to enroll, so be sure to take advantage of this chance to improve your grades and open doors to future opportunities.
 
Why is this important? A-G completion is the key to meeting Cal State and other college entrance requirements—and every grade matters.  Whether your goal is college, career, military service, or entering the workforce, strong Academics open doors.  At the same time, involvement in Activities, Athletics, and the Arts builds leadership, discipline, teamwork, creativity, and character.  The 4 As work together to prepare you for life beyond Montclair.
Seniors, this is the quarter you have been waiting for!
 
The finish line is in sight, and now is your time to shine brighter than ever academically, athletically, artistically, and through your Activities.  Stay focused, stay motivated, and make these final months count.  Senior events, competitions, performances, awards, and unforgettable memories are ahead. Graduation is just around the corner, and your hard work across all 4 As is about to pay off.
 
Finish the year strong, Cavaliers!
 
Dr. Lino Gomez
Principal
Montclair High School