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Welcome to Horizon High School

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.

Horizon AM/PM Traffic Flow

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Light Blue Route:

Enter from Holly St and turn west at the northern entrance; travel west and then south to 136th Ave exit.

Pink Route:

Enter from westbound 136th Ave and turn right at the first entrance to school; travel to the northeast side of the building; exit either at Holly or at 136th Ave.

Yellow Route: 

Enter from eastbound on 136th at the 2nd entrance; make a immediate left into the drop off area or travel to the northeast side of the building; exit either at Holly St. or 136th Ave.

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.

Social Media

Follow us on Facebook and Twitter

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

FASFA Help Session

FASFA Help Session

Date & Time: Thu, 10/25/2018 - 5:30pm to 7:00pm
Location: Horizon High School, 5321 E 136th Ave, Thornton, CO 80602, USA


10/25/2018 - 5:30pm
Oct 25

Orchestra Festival

Orchestra Festival

Date & Time: Sat, 11/03/2018 (All day)
Location: Mountain Range High School, 12500 Huron St, Westminster, CO 80234, USA

11/03/2018 (All day)
Nov 3

CU Madrigal Festival-TBD

CU Madrigal Festival-TBD

Date & Time: Wed, 11/07/2018 - 9:00am to 10:00am
Location: University of Colorado Boulder: CU Book Store, 1669 Euclid Ave, Boulder, CO 80309, USA

11/07/2018 - 9:00am
Nov 7

Jazz Band Concert

Jazz Band Concert

Date & Time: Thu, 11/08/2018 - 7:00pm to 9:00pm
Location: Horizon High School, 5321 E 136th Ave, Thornton, CO 80602, USA

11/08/2018 - 7:00pm
Nov 8

Upcoming Sports

Boy's Basketball Open Gym

Boy's Basketball Open Gym

Date & Time:
Repeats every week every Monday and every Wednesday until Mon Oct 22 2018.
Mon, 10/22/2018 - 7:00pm to 8:30pm

10/22/2018 - 7:00pm
Oct 22

Volleyball vs Monarch

Volleyball vs Monarch

Date & Time: Tue, 10/23/2018 - 4:30pm to 8:30pm
Location: Monarch High School, 329 Campus Dr, Louisville, CO 80027, USA


10/23/2018 - 4:30pm
Oct 23

Girls' Basketball Open Gym

Girls' Basketball Open Gym

Date & Time: Thu, 10/25/2018 - 6:00pm to 8:00pm
Location: Main Gym

10/25/2018 - 6:00pm
Oct 25

Varsity Football vs Legacy

Varsity Football vs Legacy

Date & Time: Fri, 10/26/2018 - 7:00pm to 9:00pm
Location: North Stadium, 12500 Delaware Dr, Westminster, CO 80234, USA

10/26/2018 - 7:00pm
Oct 26