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Welcome to Horizon High School

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Horizon High School is committed to excellence on all fronts — academic achievement, arts, athletics and co-curricular activities. Horizon balances a holistic liberal arts education with rigorous content-specific curriculum to equip students for success beyond graduation.

Teachers and staff get to know students as individuals, guiding them through the wide variety of academic experiences at Horizon. Academically, students are challenged to think critically and problem solve. During their high school years, Horizon students develop a strong work ethic that empowers them to take responsibility for their choices, decisions and future.

In a safe, caring community, Horizon fosters global thinking and transformative experiences that shape students for success in the 21st-century world.

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Congratulations Horizon High School for being recognized as a
2019 National Gold Council of Excellence

Unique Programs

The SOAR program is a four year, comprehensive program which provides an accelerated, rigorous course load across three majors: Humanities, Fine and Performing Arts, and Math/Science.
The Big Idea Project provides students quality experiential education opportunities to schools to build student leadership, wellbeing, workforce readiness and applied skills. Check back on our Big Idea Project Webpage for Big Idea opportunities! 

Social Media

Follow us on Facebook and Twitter

Click here for information about the 2020 yearbook, including senior photo instructions and deadlines.

Adams 12 Five Star Schools is one of 547 school districts in the United States and Canada to earn a place on the 5th Annual AP District Honor Roll for increasing access to AP course work while simultaneously maintaining or increasing the percentage of students earning scores of 3 or higher on AP Exams.


Address5321 E. 136th Avenue
Thornton , CO
Office Phone720-972-4400
Fax Number720-972-4599
Office Hours7:00 am - 3:30 pm
School Hours
7:15 am - 3:00 pm
Early Release
7:10 am - 12:30 pm

Upcoming Events

SAT & PSAT 10 Test Day

SAT & PSAT 10 Test Day

Date & Time: Tue, 04/14/2020 (All day)

SAT & PSAT 10 Test Day

04/14/2020 (All day)
Apr 14

PSAT 9 & CMAS Science 11 Test Day

PSAT 9 & CMAS Science 11 Test Day

Date & Time: Wed, 04/15/2020 (All day)

PSAT 9 & CMAS Science 11 Test Day

04/15/2020 (All day)
Apr 15

Spring Awards Ceremony

Spring Awards Ceremony

Date & Time: Wed, 04/22/2020 - 2:00pm to 3:30pm
Location: HHS Auditorium

04/22/2020 - 2:00pm
Apr 22

Spring Play at 7:00 pm

Spring Play at 7:00 pm

Date & Time:
Repeats every day until Sat Apr 25 2020.
Thu, 04/23/2020 - 7:00pm

04/23/2020 - 7:00pm
Apr 23

Spring Play at 7:00 pm

Spring Play at 7:00 pm

Date & Time: Fri, 04/24/2020 - 7:00pm

04/24/2020 - 7:00pm
Apr 24