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B−

Riverdale Ridge High School

PublicHighGrades 9–12

13380 Yosemite Street, Thornton, CO 80602 · (303) 655-6800 · Part of School District 27J

Thornton’s School Grade B+ better than 65% of Colorado school districts

Directions
Students
1,784
Students per teacher
22:1
Free or reduced lunch
39%
Setting
Suburb
Grades
9–12
The gist

What stands out about Riverdale Ridge High School

  • Its own letter, B−: better results than 54% of Colorado’s public schools
  • Math proficiency 9 pts below the state
  • Larger classes: 22 students per teacher
  • Enrollment up 49.3% since 2020–21

On the path

Where Thornton kids come from and go next. The whole path →

6–87 middle schoolsDepends on your address
9–12Riverdale Ridge High SchoolYou are here

Test scores

2020–21
Math proficiency22%
State average 30.5%
Reading / language arts50%
State average 47%

Its own letter, B−, places these results among Colorado’s 1,665 public schools with results. Source: EDFacts via Urban Institute Education Data Portal (SY2020-21).

Location

Directions ↗

13380 Yosemite Street, Thornton

Students

Enrollment by grade
Grade 9467
Grade 10468
Grade 11450
Grade 12399
Enrollment over time
1,195’20
1,332’21
1,463’22
1,636’23
1,784’24

Up 49.3% since 2020–21.

Who goes here
Hispanic 45%White 42%Asian 6%Two or more races 5%Black 2%American Indian/Alaska Native <1%

As reported to NCES, share of students with a reported race or ethnicity.

Parents talk

Questions and answers about Riverdale Ridge High School from Thornton families.

Other schools in School District 27J

The district →
Bromley East Charter School
Elementary · Grades PK–8 · Brighton
C+
1,214 students29:1
Reunion Elementary School
Elementary · Grades PK–5 · Commerce City
B
742 students19:1
Turnberry Elementary
Elementary · Grades PK–5 · Commerce City
C
742 students18:1
Second Creek Elementary School
Elementary · Grades PK–5 · Commerce City
C−
697 students18:1
West Ridge Elementary
Elementary · Grades PK–5 · Thornton
B
690 students17:1
Southlawn Elementary School
Elementary · Grades PK–5 · Commerce City
673 students22:1

School facts: U.S. Department of Education (NCES), 2024–2025 school year. Test scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). A school’s letter is our own summary of its reading and math results against Colorado’s other public schools; Thornton’s School Grade is built from its districts’ results. Map: © OpenStreetMap contributors.