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

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

Charlene Saenz, Principal
Dear Cavaliers,
I hope you had a restful Thanksgiving break. I acknowledge that this year has been unimaginable, but I remain thankful to be your principal. We have a remarkable school community, staff, parents, and for that, I am forever grateful. Thank you all for all you do to partner with us during these unprecedented times.
I can hardly believe it, but the end of our first semester is rapidly approaching. I know that our students have been working hard to advance and maintain their grades during distance learning. I recognize that many of our students are facing great adversity and that despite this adversity, they are continuing to work to the best of their ability; I am incredibly proud of them. I encourage students to not give up, to continue to work hard to finish strong this first semester, and to follow through with their commitment to success; we’re nearly there. I would like to remind them that the staff at Montclair is here to help in any way that they can, we are always only a phone call away.
Students, as we approach final exams, please take advantage of our MAST tutoring program. This tutoring support is available Monday-Thursday, and you can access the schedule below, as well as the registration link for these sessions via this link: Our final exams will take place beginning Tuesday, December 15th through Thursday, December 17th. We will not have school on Friday, December 18th. Please refer to the schedule below for additional details
Final Exam Schedule:
Monday, 12/14 Tuesday, 12/15 Wednesday, 12/16 Thursday, 12/17 Friday, 12/18
Regular Schedule Period 1
8:15 - 9:45
Period 5
8:15 - 9:45
Period 1
8:15 - 9:45
Non-Student Day
  Period 2
9:45 - 11:15
Period 6
9:45 - 11:15
Period 2
9:45 - 11:15
  Period 4
12:15 - 1:45
Period 7
12:15 - 1:45
Period 4
12:15 - 1:45
It is an honor to work alongside all of you. Thank you for your undying commitment to our students. I wish everyone a wonderful Christmas Break!
Your Proud Principal,
Ms. Saenz