Enrollment
184
High
DISTRICT 945 · STATE 627
SCHOOL COMMUNITY·BOULDER VALLEY SCHOOL DISTRICT NO. RE2·NCES 080249001219
Arapahoe Ridge High School
6600 ARAPAHOE AVENUE, BOULDER, CO 80303 · (720) 561-5220 · Boulder County
GRADES 09–12HIGH12-CITYTITLE IALTERNATIVE EDUCATION SCHOOL184 STUDENTS
·
allk12 Grade
Not graded
Schools serving specialized populations are not graded, because state test results are not a fair comparison for them. How grades work
Student : Teacher
15.7:1
12 FTE teachers
DISTRICT 18.5:1 · STATE 16.9:1
Free / Reduced Lunch
73%
134 students
DISTRICT 30% · STATE 50%
Community
0
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 10 | 1 | 1% |
| Grade 11 | 51 | 28% |
| Grade 12 | 132 | 72% |
Student demographics
59%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 53% · STATE 62% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
BeatsExpectations
Not computed for this schoolBeatsExpectations is not computed for specialized-population schools (schools for the deaf or blind, therapeutic and behavioral-health placements, juvenile-justice and alternative-education settings, and similar). State ELA/Math proficiency rates are not a comparable metric for these populations, so a demographically-adjusted residual against general-enrollment peers would be misleading. About the methodology →
Where Arapahoe Ridge High School ranks
Among high schools| Measure | This school | In Colorado | In Boulder County |
|---|---|---|---|
| Enrollment ranked largest first | 184 | #259 of 409 | #12 of 15 |
| Free and reduced lunch ranked highest share first | 72.8% | #72 of 320 | #2 of 13 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
184
+49 (+36%) vs 2020
+26% since 2000-01, when it was 146
Student : Teacher
15.7:1
was 6.4:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 184 | 11.8 | 15.7:1 | 73% (134) |
| 2023-24 | 245 | 30.9 | 7.9:1 | 68% (167) |
| 2022-23 | 206 | 28.2 | 7.3:1 | 68% (141) |
| 2020-21 | 135 | 21 | 6.4:1 | 50% (68) |
| 2017-18 | 103 | 23.6 | 4.4:1 | 61% (63) |
| 2015-16 | 141 | 23 | 6.1:1 | 77% (109) |
| 2010-11 | 211 | 24 | 8.8:1 | 51% (107) |
| 2000-01 | 146 | 17 | 8.6:1 | 21% (30) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Arapahoe Ridge High School.
Since 2017-18: students up 79% (103 to 184); teachers down 50% (23.6 to 11.8).
About Arapahoe Ridge High School
Arapahoe Ridge High School is a very small high school. Its address is in BOULDER, Colorado. It had 184 students in 2024-25, spanning grades 9 through 12. By comparison, high schools in Colorado enroll about 627 students on average.
Boulder Valley School District No. Re2 oversees Arapahoe Ridge High School and 55 other schools, with 27,988 students in total.
Federal enrollment data show Arapahoe Ridge High School is 53% Hispanic. The next largest groups are 36% White, 4% multiracial, 3% Black, and 3% Native American. The school's Hispanic share is 38 points above the 15% share among Boulder County residents. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 59%.
The student-to-teacher ratio at Arapahoe Ridge High School is 15.7:1, based on 11.8 full-time-equivalent teachers. Compared with the 16.9:1 average for high schools in Colorado, this school's ratio is lower. Lunch program data show 73% of students are eligible for free or reduced-price meals. Compared with the 33% average for public schools in Boulder County, the school's rate is higher.
The school is in Boulder County, where median household income comes to about $103,994, roughly 64% of adults have a four-year degree or more, and about 4% of residents live below the federal poverty line. Boulder County's 86 public schools enroll about 42,200 students and include Arapahoe Ridge High School.
Boulder Universal is less than a tenth of a mile from Arapahoe Ridge High School, the shortest distance to any other public school. The five-mile area around Arapahoe Ridge High School holds at least 8 other public schools.
The federal government classifies Arapahoe Ridge High School's location as City: Mid-size.
Enrollment rose 36% over 4 years, reaching 184 in 2024-25. The ratio of students to teachers went from 6.4:1 to 15.7:1 over the same years.
Parents, students, and staff can share information on pickup and drop-off, after-school programs, and teacher feedback here. Parents, students, alumni, and staff are welcome to post.
Boulder County at a glance
View full county profilePopulation
328,961
Census ACS
Median income
$103,994
Household, ACS
Bachelor's+
64%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
86
42,200 students
Quick facts
Related schools
Other schools in Boulder Valley School District No. Re2
- Boulder High SchoolHigh · 1,939 students
- Fairview High SchoolHigh · 1,863 students
- Broomfield High SchoolHigh · 1,693 students
- Centaurus High SchoolHigh · 1,557 students
- Peak to Peak Charter SchoolCombined · 1,447 students
- Monarch High SchoolHigh · 1,431 students
Other schools in BOULDER
- Boulder High SchoolHigh · 1,939 students
- Fairview High SchoolHigh · 1,863 students
- Williamsburg Academy of ColoradoHigh · 622 students
- Centennial Middle SchoolMiddle · 598 students
- Southern Hills Middle SchoolMiddle · 502 students
- Nevin Platt Middle SchoolMiddle · 483 students
Nearby schools
- Boulder Universal0.0 mi · 231
- Nevin Platt Middle School1.0 mi · 483
- Douglass Elementary School1.4 mi · 313
- Eisenhower Elementary School1.9 mi · 308
- Manhattan Middle School of the Arts and Academics2.1 mi · 482
- Boulder Community School/Integrated Studies2.5 mi · 255
Frequently asked questions
About Arapahoe Ridge High SchoolHow many students attend Arapahoe Ridge High School?
Arapahoe Ridge High School enrolls approximately 184 students in grades 09-12.
Is Arapahoe Ridge High School an elementary, middle, or high school?
Arapahoe Ridge High School is a high school covering grades 09-12.
How many teachers does Arapahoe Ridge High School have?
Arapahoe Ridge High School employs 12 FTE teachers, for a student-to-teacher ratio of 15.7:1.
What is the student diversity at Arapahoe Ridge High School?
Student demographics at Arapahoe Ridge High School are roughly 36% White, 53% Hispanic, 3% Black, 1% Asian, 4% Two or more.
What district is Arapahoe Ridge High School in?
Arapahoe Ridge High School is part of Boulder Valley School District No. Re2.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.