No UC admissions data on file for Mattole Triple Junction High School.

This school doesn't appear in UCOP's source-school records (it may send few or no applicants to UC). Its enrollment trend and similar-school comparison are still below.

Mattole Triple Junction High School

Petrolia · Humboldt County · Mattole Unified · Public

Public Humboldt County Mattole Unified → CDS 1275382…

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Data Year

Compare with peers

Most similar nearby schools

Casterlin High → South Coast Continuation → Whale Gulch High → Mendocino Sunrise High → Southern Trinity High → Compare all similar →

At a glance

Programs & features

1 AP courses offered — Limited

Academic signals

AP rigor: Bottom 14% of US high schools
SAT/ACT participation: Bottom 6% by test-taker volume

Composed from federal CRDC offerings, and other public data. Full breakdowns below.

How Mattole Triple Junction High School compares for families

What families should know about Mattole Triple Junction High School.

▸ vs Similar SchoolsThe closest comparables nearby: Casterlin High, South Coast Continuation, Whale Gulch High and 2 more. See the sidebar to compare side-by-side.

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California College-Going Rate

College-going rate: —

The share of 2022-23 graduates who enrolled at a college anywhere in the U.S. within 12 months, per the National Student Clearinghouse match the California Department of Education publishes.

—

CDE masks small groups. It suppresses every figure for a school whose graduating class is 10 students or fewer, so no rate is published for Mattole Triple Junction High’s 2022-23 class. The figure exists — it is withheld, not missing.

Source: California Department of Education, College-Going Rate (DataQuest) ↗, cohort 2022-23, posted 17-Sep-2025. Data file: cgr12mo23.txt ↗ (and the 16-month file ↗). CDE builds the rate by matching California high school completers to National Student Clearinghouse enrollment records; we publish CDE’s aggregates and hold no student-level data.

Academic rigor

AP + advanced-course offerings

Limited — narrow advanced curriculum

Bottom 14% of US high schools

Less rigorMore rigorMost rigor

AP courses offered

Subject breadth not reported

Students taking AP courses

≈100 per 100 students · uptake, not just offerings

Other rigor signals

No dual-enrollment or gifted program reported

Source: federal Civil Rights Data Collection (CRDC 2020-21). CRDC reports what's offered + enrolled — it doesn't collect AP exam pass rates (College Board owns that data and doesn't release it school-level).

SAT / ACT participation

CRDC federal data · 2020-21

Bottom 6% by test-taker volume

SAT/ACT test-takers

11th-12th graders who took 1+ college admissions test

Test-taking intensity

Essentially all eligible

Senior-heavy / specialty program — takers exceed grade 9-12 enrollment

Compared against

18,426

US high schools reporting SAT/ACT participation

Source: federal Civil Rights Data Collection (CRDC 2020-21). Volume — not score — is what's reported here. A higher count means more students at this school are entering the college admissions pipeline. Note: 2020-21 was COVID-disrupted; some districts (especially those that stayed remote longer) report unusually low or zero takers.

Student composition — 2025-26

HS grades 9–12 racial/ethnic composition and program subgroups, from CDE Census Day Enrollment. Two-year shift shown when ≥1 pt — surfaces how the community served has changed since 2023-24.

Race / ethnicity

White 60% -6.7

American Indian 40% +6.7

Program subgroups

Source: California Department of Education, Census Day Enrollment 2025-26 (HS grades 9–12). Δ shown when shift is ≥1 pt since 2023-24. Categories below 0.5% omitted.

Chronic absenteeism — 2020-21

Share of students missing 10% or more of expected attendance — the leading indicator that often precedes the demand decline shown above. Families disengaging tend to raise absenteeism first, then formally leave. Basis: grades 9–12.

Kids show up: 0% are chronically absent versus about 13% statewide — engagement most schools would envy.

Chronic absent

0.0%

0 of 13 students

Absenteeism is down 7.1 pp since 2016-17. Engagement improving — a positive trajectory worth understanding and reinforcing.

Humboldt County median

7.4% · school is better than 100% of 13 HS

Statewide median

13.2%

Chronic absenteeism by year (raw %)

Source: California Department of Education, Chronic Absenteeism 2020-21. Benchmarks limited to non-virtual public & charter HS with ≥100 eligible students. CDE didn't publish a usable 2019-20 file (COVID).

Enrollment trend & projection

Total enrollment (9–12)

14 (2018) → 5 (2026)

-64.3%

Grade 12 (graduating class)

1 (2018) → 1 (2026)

+0.0%

How does Mattole Triple Junction High School really compare on getting kids to college?

Unlock a head-to-head snapshot of Mattole Triple Junction High School against its 10 most similar nearby schools — matched on size, location, type. See exactly where it stands on the college pipeline.

The full head-to-head table — every peer school's UC Reach, side by side.

Enrollment trend + 3-year projection — is this school growing or quietly shrinking?

The plain-English read on what it all means for your family.

Your similar-school group includes

Casterlin High · South Coast Continuation · Whale Gulch High · Mendocino Sunrise High · Southern Trinity High · Valley High · +4 more

Enrollment stability & demand — 2024-25

Two complementary signals: retention (do students stay once enrolled?) and demand (are families choosing the school?). Read against the Humboldt County baseline — the demographic tide is moving every CA HS, so a school's gap vs. county is the actionable signal.

40% of students who start the year finish it here — more churn than most CA schools. Ask what's behind the turnover.

Critical

Compounding decline on both vectors.

Enrollment +0.0% vs. county +41.0% AND stability (40.0%) below the county median. Recruitment and retention both under pressure — likely a foundational rather than tactical problem.

+0.0% senior class, grade 12 (2018–2026)

+41.0% Humboldt County baseline

-41.0pp gap vs. county

40.0% retention (county median 88.7%)

Senior class (grade 12) — indexed to 100 at 2018

Stability rate by year (raw %)

Stability rate

40.0%

2 of 5 students

3 of 5 students who enrolled at Mattole Triple Junction High School this year didn't maintain continuous enrollment (60.0% non-stability). Mid-year transfers, dropouts, and other exits are all counted.

Humboldt County median

88.7% · school is in the 0th percentile of 12 HS

Statewide median

87.3% · in the 12th percentile of 1,734 HS

Nearest peer high schools

Casterlin High 100.0% South Coast Continuation 54.5% Whale Gulch High 57.1% Southern Trinity High 71.4%

Source: California Department of Education, Stability Rate 2024-25. Benchmarks limited to non-virtual public & charter HS with ≥100 cumulative enrollees so by-design-high-churn continuation schools don't dominate the bottom of the distribution. Cumulative enrollment counts every student on the rolls during the year, so it can exceed peak-day enrollment.

District financial profile — Mattole Unified (FY2020)

From 4 years of NCES F-33 filings (the federally-mandated district finance survey). Public schools don't have their own books — the district does. These figures show the financial scale, revenue dependence, instruction-vs-overhead mix, and long-term debt that shape what a school can sustain.

Total revenue

$1.4M

-85.3% since FY2017

Per-pupil revenue

$31,044

45 students enrolled

Revenue mix

State: 34.6%
Local: 60.5%
Federal: 4.9%

Instruction share

51.8%

of current spending · $17,022/pupil

Long-term debt

$2.1M

+4.5% since FY2017

Total revenue by year ($M)

Total expenditure by year ($M)

Source: NCES F-33 Annual Survey of School System Finances (Urban Institute Education Data API). Latest year currently published: FY2020. F-33 is a district-level federal filing — it reflects the Mattole Unified as a whole, not this individual school's books. Revenue mix shows where the district's dollars come from (state aid dominates in CA via LCFF). Instruction share is current expenditure on instruction ÷ total current expenditure (national benchmark ~60%). Long-term debt is end-of-year outstanding (mostly facilities bonds).

For School Admins

The full Reach Report for Mattole Triple Junction High School

A board- and LCAP-ready intelligence brief: your enrollment retention and college outcomes, benchmarked against your closest competitors, with a 5-year forecast, concrete steps to act on, and the rigor + outcomes story you can share with your families. Built from primary public data — prepared for you, not auto-generated.

✓Student-retention benchmarking vs your county median — and the LCAP evidence to back your goals

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