Home
›
High School Rankings
Colusa County · 2025 · ≥50 seniors
What is UC Reach? UC Reach = unique top-6 UC admits ÷ senior class size — the share of a school's
entire graduating class that reaches the six most selective UCs (
Berkeley,
UCLA, San Diego, Santa Barbara, Irvine, Davis). It's a better gauge of school-wide success than admit rate, which only reflects the handful of students who applied.
Why it beats admit rate: if 6 students apply to the top UCs and all get in, that's a 100% admit rate — but at a 1,000-senior school it's a UC Reach of just 0.6% (6 ÷ 1,000). By contrast, a school where 250 of 1,000 seniors land a top-UC admit has a 25% UC Reach — far stronger, even though its admit rate is lower.
Why some schools are over 100%? Out of every 100 seniors at these schools, the class is generating
more than 100 admissions to the six most selective UCs — meaning the typical strong student is getting in at multiple top campuses (
UCLA +
UCSD, or
Berkeley +
UCSB + Irvine, for example). It's a rare achievement: fewer than 1% of California high schools clear 100% UC Reach.
Top and bottom schools by UC Reach, split public/charter vs private (≥50 seniors).
Scoped to Colusa County — change the County filter above to rescope.
▲ Top 10 Public + Charter
Colusa County
| 1 |
Pierce High School
Arbuckle · Public
|
8.9% |
| 2 |
Colusa High School
Colusa · Public
|
2.8% |
▲ Top 10 Private
Colusa County
Not enough schools in Colusa County for this list.
▼ Bottom 10 Public + Charter
Colusa County
| 1 |
Colusa High School
Colusa · Public
|
2.8% |
| 2 |
Pierce High School
Arbuckle · Public
|
8.9% |
▼ Bottom 10 Private
Colusa County
Not enough schools in Colusa County for this list.
Where each UC campus lands its admits, as a share of each high school's senior class. Same 50-senior floor.
Top 10 — UCB Reach
UC Berkeley
Not enough schools in Colusa County for this list.
Not enough schools in Colusa County for this list.
Top 10 — UCSD Reach
UC San Diego
Not enough schools in Colusa County for this list.
Top 10 — UCSB Reach
UC Santa Barbara
| 1 |
Pierce High School
Arbuckle · Public
|
3.2% |
Top 10 — UCI Reach
UC Irvine
Not enough schools in Colusa County for this list.
Top 10 — UCD Reach
UC Davis
| 1 |
Pierce High School
Arbuckle · Public
|
5.6% |
| 2 |
Colusa High School
Colusa · Public
|
2.8% |
UC Reach measures who gets in. These lenses measure the upstream pipeline (A-G), the downstream outcome (UC graduation), the capacity that drives the pipeline (counselors), reliability over time (consistency), grade-11 academic preparation (CAASPP SBAC ELA & Math), and private-school financial strength. Click any school for its full profile.
Top 10 — A-G Completion
% of graduates meeting UC/CSU course requirements · 2024-25 cohort
| 1 |
Williams Junior/Senior High
· Public
|
51.4% |
| 2 |
Pierce High School
Arbuckle · Public
|
44.1% |
| 3 |
Colusa High School
Colusa · Public
|
29.4% |
Top 10 — UC 6-Yr Grad Rate
% of UC entrants who finished in 6 years · cohort N ≥ 20
No UC grad data for this filter.
Top 10 — Best Counselor Capacity
Lowest students-per-counselor (ASCA target 250:1) · public/charter, ≥500 students
| 1 |
Williams Junior/Senior High
· Public
|
313:1 |
Top 10 — Most Consistent
Lowest UC Reach std-dev across 5 years (above-CA-median mean)
| 1 |
Pierce High School
avg 8.7% · σ 5.09
|
σ 5.09 |
Top 10 — SBAC ELA met/exceeded
% Met or Exceeded Standard · Grade 11 CAASPP · public/charter · tested ≥30
| 1 |
Pierce High School
Arbuckle · n=119 · 2025
|
64% |
| 2 |
Colusa High School
Colusa · n=107 · 2025
|
55% |
| 3 |
Maxwell Sr High
· n=35 · 2025
|
37% |
| 4 |
Williams Junior/Senior High
· n=86 · 2025
|
36% |
Top 10 — SBAC Math met/exceeded
% Met or Exceeded Standard · Grade 11 CAASPP · public/charter · tested ≥30
| 1 |
Pierce High School
Arbuckle · n=119 · 2025
|
21% |
| 2 |
Maxwell Sr High
· n=35 · 2025
|
17% |
| 3 |
Colusa High School
Colusa · n=107 · 2025
|
14% |
| 4 |
Williams Junior/Senior High
· n=88 · 2025
|
5% |
Top 10 — Private Net Assets
Wealthiest CA private high schools · IRS Form 990 · latest fiscal year
No private-school 990 data for this filter.
≥50 seniors · earliest→latest year
Which schools are moving a growing — or shrinking — share of their graduating class into the six most selective UCs. Reflects the current county/type filter.
▲ Biggest gains
| School | Then → Now | Δ |
|---|
|
Pierce High School
Arbuckle · Public
|
3% '19
→ 9% '25
|
+6.0pp |
▼ Biggest declines
| School | Then → Now | Δ |
|---|
|
Pierce High School
Arbuckle · Public
|
3% '19
→ 9% '25
|
6.0pp |
grade-12 enrollment Δ vs. county · ≥80 students
The demographic tide is shrinking CA enrollment ~10% over 7 years statewide, so absolute decline alone is noise. The gap vs the county baseline is the actionable signal — schools losing share faster than their demographic floor are the ones to watch. Reflects the current county/type filter.
▲ Outperforming the county the most
| School | School · County | Gap |
|---|
|
Pierce High School
Arbuckle · Colusa · Public Demand problem
|
+20.6% vs +24.8%
|
-4.3pp |
▼ Underperforming the county the most
| School | School · County | Gap |
|---|
|
Pierce High School
Arbuckle · Colusa · Public Demand problem
|
+20.6% vs +24.8%
|
-4.3pp |
0 schools eligible · 2025
Each dot is one school. The diagonal is the per-campus GPA expectation — points above it admit students at higher rates than their GPA mix predicts; points below admit at lower rates. Schools need ≥30 top-6 UC applications and data across ≥3 campuses to appear.
No schools in the current filter set have enough GPA + application data to chart. Try removing the county or type filter.
Sortable by any column. Click a column header to sort. Click any school row to open its profile.
2 schools · 2025 data
· 1 hidden (under 100 seniors)
| # |
School |
County |
Seniors
ⓘ
|
Total Enroll
ⓘ
|
UC Reach
ⓘ
|
App Reach
ⓘ
|
Admit Rate
ⓘ
|
Yield
ⓘ
|
Selective Reach
ⓘ
|
Elite Reach
ⓘ
|
Raw Apps
ⓘ
|
Raw Admits
ⓘ
|
| 1 |
Pierce High School
Arbuckle · Public Demand problem
|
Colusa |
124 |
463 |
8.9%
|
37.1% |
23.9% |
27.3% |
3.2 |
— |
46 |
11 |
| 2 |
Colusa High School
Colusa · Public Strong demand
|
Colusa |
109 |
431 |
2.8%
|
38.5% |
7.1% |
— |
— |
— |
42 |
3 |
UC Reach = top-6 UC admits ÷ senior class size. Where UCOP has not published unique-student totals,
campus admits are summed — students admitted to more than one of the 6 campuses are counted at each, so values
above 100% indicate strong students winning multiple competitive UC offers.
Schools with fewer than 100 seniors are excluded from the leaderboard by default — a small cohort
with one strong year can otherwise dominate.
See methodology →