Horizon High School

Horizon High School

Public High School | Grade 9-12
5321 E 136th Ave,  Thornton, CO
Adams 12 Five Star Schools
3.7
2.5
1,981 Students
B+
Niche Grade

School Details

Student Teacher Ratio
20:1
Average SAT Score
1170
Average ACT Score
24
Math Proficiency
43%
Reading Proficiency
62%
Average GPA
3.41
Graduation Rate
96%

Niche Grade

B+
Academics
B
Teachers
B
College Prep
B-
Administration
B-
Resources/Facilities
B+
Clubs and Activities
B+
Sports
C
Food
Source: Niche
Niche Grades

Niche grades and rankings are calculated using dozens of public data sets and millions of reviews. Niche data scientists and user researchers rigorously analyze data and user opinions to assess the key aspects of K-12 Schools, Colleges, and Places to Live. Every month, millions of students and families use the Niche grades and report cards to find the right school or neighborhood.

Niche Grade Details

Academics
Average GPA
3.41
Reading Proficiency
62%
Math Proficiency
43%
Teachers
Student Teacher Ratio
20:1
Teachers
100
Full Time Teachers
100
Teachers in First or Second Year
1.1%
College Prep
Average SAT
1170
Math
590
Verbal
580
Average ACT
24
Math
24
English
23
Reading
25
Science
24
Number of AP Courses
17
AP Pass Rate
72.3%
AP Math Enrollment
High
AP Science Enrollment
Average
Other AP Enrollment
Very Low
Clubs and Activities
Girls Athletic Participation
Low
Boys Athletic Participation
Very Low

GreatSchools Rating

6
Equity
9
College Readiness
Source: GreatSchools
GreatSchools Rating
The GreatSchools Rating helps parents compare schools within a state based on a variety of school quality indicators and provides a helpful picture of how effectively each school serves all of its students. Ratings are on a scale of 1 (below average) to 10 (above average) and can include test scores, college readiness, academic progress, advanced courses, equity, discipline and attendance data. We also advise parents to visit schools, consider other information on school performance and programs, and consider family needs as part of the school selection process.
View GreatSchools Rating Methodology

GreatSchools Rating Details

Test Scores

Science
21.5%
State Average
30.7%
GreatSchools Test Scores Rating
GreatSchools
The Test Score Rating reflects annual state test results for this school compared with scores statewide.

Teachers and Staff

Students Per Counselor
295:1

Student Diversity

Male
50.3%
Female
49.7%
White
53.1%
Hispanic
33.8%
Two or more races
5.9%
Asian or Pacific Islander
5.6%
Black
1.1%
Native American
<1%
Native Hawaiian or Other Pacific Islander
<1%

Specialty School Programs

AP Programs Offered
IB Programs Offered
Free/Reduced Lunch Offered
Athletics Program

Colleges Students are Considering

Students are most interested in or go on to attend these colleges.
Colorado State University 513 Students
University of Colorado Boulder 466 Students
Metropolitan State University of Denver 342 Students
University of Northern Colorado 336 Students
University of Colorado Denver 306 Students
University of Denver 226 Students
Colorado Mesa University 205 Students
University of Colorado - Colorado Springs 192 Students
Front Range Community College 183 Students
Colorado School of Mines 181 Students

What Students Want to Study

Niche users from this school are most interested in the following majors.
Business 129 Students
Psychology 113 Students
Nursing 100 Students
Biology 78 Students
Pre-Medicine Studies 64 Students
Computer Science 48 Students
Engineering 45 Students
Criminology 45 Students
Forensic Science and Technology 44 Students
Marketing 40 Students

This School’s Reviews

Niche Reviews
3.7 350 Reviews
3.0 Alum
8/11/2025
Large school with a diverse student base. Lots of resources and generally good teachers. Art teacher was bad. Routinely removed students (transferred to an alternative school) if they were deemed unlikely to graduate.
5.0 Alum
7/11/2025
I loved my time at Horizon. I did things that made me uncomfortable but those experiences helped me to grow and have an amazing time. Teachers and other admin knew me by name even though I had never been in their office before.
4.0 Junior
6/9/2025
I would say my experience with this high school is overall pretty good. There isn't any major things to stand out, but the people are very kind and caring. The best parts are probably the people that are there and the worst part is the amount of homework that we get on a daily basis. And the changes I would like to see are probably having slightly less homework so then I can work on other stuff than just schoolwork.
See All Niche Reviews
GreatSchools Reviews
2.5 13 Reviews
5.0 parent
3/10/2019
My student had access to a high quality, well rounded education with support by many caring individuals at this school. I recommend it.
Read Full Review
2.0 student
10/15/2018
I would rate the school a 0 out of anything. My experiences throughout my three and a half (I graduated a semester early because I hate the school.) year were horrible, I've had only 7 teachers that cared for the students (I've gone through a total of around 30 teachers). At the end of my junior yea...
Read Full Review
1.0 student
1/24/2018
The Special Education program at this school is terrible because of the special ed gives a shit about kids and actually helping them out when they need it all they do is sit there saying they care when they could care less if your kid is helped. And of course the school does shit about stopping bull...
Read Full Review
1.0 other
9/2/2017
A family member of mine got violentlt attacked here during an off hour and kids took videos. The school is backing the bully. If you love your child-do not send them here. This school is disgraceful.
Read Full Review
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Colorado Adams County Thornton 80602
Horizon High School

Horizon High School is a public school for students in grades 9-12 in Thornton, CO and is served by the Adams 12 Five Star Schools in Colorado. Annual tuition is $0. The school has a total enrollment of 1,981 and maintains a student-teacher ratio of 20:1. Academic records show that 43% of students achieve proficiency in math, and 62% are proficient in reading. Horizon High School has received feedback and ratings, with a Niche grade of B+ and a GreatSchools Rating of 8 out of 10. The average GPA is 3.41, the graduation rate is 96%, and average standardized test scores include an SAT score of 1170 and an ACT score of 24. Discover additional schools in the area, like Riverdale Ridge High School, Stargate Charter School, Westgate Community School, and more. Learn more about what Thornton has to offer, and browse homes for sale and for rent near Horizon High School.

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eXp Realty, LLC
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