Sierra School of Main Street
Longmont · CO · Private independent · K-12 combined
Similar nearby schools
Most similar nearby schools
Desiderata School → Alexander Dawson School → Joshua School-Boulder → Temple Grandin School → Bolder Pathway School → Crossroads School → Shining Mountain Waldorf School → Longmont Christian School →Keep this page current
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How Sierra School of Main Street compares for families
What families should know about Sierra School of Main Street.
- ▸ LocallyCO students outperform the US average on NAEP 8th-grade math (+4 points).
- ▸ vs Similar SchoolsThe closest comparables nearby: Desiderata School, Alexander Dawson School, Joshua School-Boulder and 5 more. See the sidebar to compare side-by-side.
For Parents
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Your state's public flagship
University of Colorado Boulder
The in-state tuition gap is the flagship's biggest draw — most in-state families pay far less than the out-of-state sticker. Average net price after aid runs about $25,346/yr. Admission odds depend on your student's GPA and test scores, not which high school they attend.
Source: IPEDS admissions, tuition & enrollment + College Scorecard net price. Flagship = the state's primary public research university.
Not enough enrollment history on file to chart a trend for this school yet.
Most similar nearby high schools
The schools most like this one — same type, blended on distance and size — and where their enrollment is heading. These are the schools families here weigh against each other.
| School | Type | Miles | HS enrollment | Trend |
|---|---|---|---|---|
| Desiderata School Longmont |
Private | 2.6 | 18 | — |
| Alexander Dawson School Lafayette |
Private | 7.6 | 521 | +0.8% |
| Joshua School-Boulder Boulder |
Private | 8.3 | 18 | — |
| Temple Grandin School Boulder |
Private | 11.4 | 18 | — |
| Bolder Pathway School Broomfield |
Private | 12.6 | 10 | — |
| Crossroads School Longmont |
Private | 0.8 | 25 | — |
| Shining Mountain Waldorf School Boulder |
Private | 12.7 | 199 | -19.4% |
| Longmont Christian School Longmont |
Private | 0.8 | 148 | -14.0% |
At a glance
JSON · Using this page with an AI assistantSierra School of Main Street is a private high school in Longmont, CO, enrolling 40 students in grades 9-12 in 2022.
Sources: National Center for Education Statistics (enrollment), the federal Civil Rights Data Collection and EDFacts, state education agencies where named, and the school's own published documents where named.
Questions families ask
How many students attend Sierra School of Main Street? Sierra School of Main Street is a private high school in Longmont, CO, enrolling 40 students in grades 9-12 in 2022.
Analysis: Test Prep Gurus (High School Reach, highschoolreach.com). These figures may be quoted with attribution to Test Prep Gurus.
What does AI tell parents about Sierra School of Main Street?
When a parent asks an AI assistant about Sierra School of Main Street, the answer is built from a handful of sources, and Reach is often one of them. We will send the admissions office a short report on what AI says about Sierra School of Main Street and where it comes from. The first report is free.
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Related reading
AP courses · October 2026
Test scores · October 2026