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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

Back to School Night

Back to School Night

Date & Time: Thu, 08/16/2018 - 5:00pm to 7:00pm

08/16/2018 - 5:00pm
Aug 16



Date & Time: Mon, 09/03/2018 (All day)

09/03/2018 (All day)
Sep 3

Upcoming Sports

Eaton Boys Golf Invite

Eaton Boys Golf Invite

Date & Time: Thu, 08/16/2018 - 8:00am to 1:00pm
Location: Eaton Country Club Golf Shop, 37661 Co Rd 39, Eaton, CO 80615, USA

08/16/2018 - 8:00am
Aug 16

Boys Tennis vs Northglenn

Boys Tennis vs Northglenn

Date & Time: Thu, 08/16/2018 - 3:30pm to 6:30pm
Location: Horizon High School, 5321 E 136th Ave, Thornton, CO 80602, USA

08/16/2018 - 3:30pm
Aug 16

Varsity & JV Softball@Cherokee Trail

Varsity & JV Softball@Cherokee Trail

Date & Time: Thu, 08/16/2018 - 4:30pm to 6:30pm
Location: Cherokee Trail High School, 25901 E Arapahoe Rd, Aurora, CO 80016, USA

08/16/2018 - 4:30pm
Aug 16

Varsity Softball Tournament@Columbine HS

Varsity Softball Tournament@Columbine HS

Date & Time: Fri, 08/17/2018 - 3:00pm to 5:00pm
Location: Columbine High School, 6201 S Pierce St, Littleton, CO 80123, USA

08/17/2018 - 3:00pm
Aug 17

Varsity Softball Tournament@Columbine HS-TBD

Varsity Softball Tournament@Columbine HS-TBD

Date & Time: Sat, 08/18/2018 - 10:00am to 11:00am
Location: Columbine High School, 6201 S Pierce St, Littleton, CO 80123, USA

08/18/2018 - 10:00am
Aug 18