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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 recognied 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 opportunites to schools to build student leadership, wellbeing, workforce readiness and applied skills. Check back on our Big Idea Project Webpage for Big Idea opportunites! 

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

9th Grade ICAP in Core

9th Grade ICAP in Core

Date & Time: Thu, 09/26/2019 (All day)

09/26/2019 (All day)
Sep 26

Upcoming Sports

Cross Country - Dave Sanders Invitational

Cross Country - Dave Sanders Invitational

Date & Time: Fri, 09/20/2019 - 3:00pm to 6:00pm
Location: Robert F. Clement Park, 7306 W Bowles Ave, Littleton, CO 80123, USA

09/20/2019 - 3:00pm
Sep 20

Football Freshmen

Football Freshmen

Date & Time: Fri, 09/20/2019 - 4:30pm to 6:30pm
Location: Thunder Ridge High School, 1991 W Wildcat Reserve Pkwy, Highlands Ranch, CO 80129, USA

09/20/2019 - 4:30pm
Sep 20

Volleyball Poudre Freshmen Tourney

Volleyball Poudre Freshmen Tourney

Date & Time: Sat, 09/21/2019 (All day)
Location: Poudre High School, 201 S Impala Dr, Fort Collins, CO 80521, USA

09/21/2019 (All day)
Sep 21

Softball @ Mountain Range

Softball @ Mountain Range

Date & Time: Sat, 09/21/2019 - 10:00am to 11:00am
Location: Mountain Range High School, 12500 Huron St, Westminster, CO 80234, USA

JV & Varsity at 10:00

09/21/2019 - 10:00am
Sep 21

Football JV @ Thunder Ridge

Football JV @ Thunder Ridge

Date & Time: Sat, 09/21/2019 - 11:00am to 1:00pm
Location: Thunder Ridge High School, 1991 W Wildcat Reserve Pkwy, Highlands Ranch, CO 80129, USA

09/21/2019 - 11:00am
Sep 21