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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



Date & Time:
Repeats every day until Fri Nov 29 2019.
Mon, 11/25/2019 (All day)

11/25/2019 (All day)
Nov 25



Date & Time: Tue, 11/26/2019 (All day)

11/26/2019 (All day)
Nov 26



Date & Time: Wed, 11/27/2019 (All day)

11/27/2019 (All day)
Nov 27

Upcoming Sports

Soccer vs Fairview

Soccer vs Fairview

Date & Time: Thu, 10/24/2019 - 4:00pm to 6:00pm
Location: North Stadium, 12500 Delaware Dr, Westminster, CO 80234, USA

JV at Horizon
Varsity at North Stadium

10/24/2019 - 4:00pm
Oct 24

Volleyball vs Greeley West

Volleyball vs Greeley West

Date & Time: Thu, 10/24/2019 - 4:30pm to 8:00pm
Location: Horizon High School, 5321 E 136th Ave, Thornton, CO 80602, USA

4:30 C & 9th
5:30 JV
6:30 Varsity

10/24/2019 - 4:30pm
Oct 24

Softball State Tournament

Softball State Tournament

Date & Time: Fri, 10/25/2019 (All day) to Sat, 10/26/2019 (All day)

10/25/2019 (All day)
Oct 25

Cross Country - State Championships

Cross Country - State Championships

Date & Time: Sat, 10/26/2019 (All day)
Location: Norris Penrose Event Center, 1045 Lower Gold Camp Rd # 3, Colorado Springs, CO 80905, USA

Times TBD

10/26/2019 (All day)
Oct 26