Castaic High School

• ▸On UC Reach, Castaic High School sits in the middle of its similar-school group (ranked #5 of 10): 18% vs. a peer median of 18%.
• ▸Its UC Reach has risen 2 points since 2023.
• ▸Across the top-6 UC campuses, Castaic High School is admitting at roughly +10 percentage points above what its average applicant GPA (3.919) alone would predict (31% actual vs. 21% expected). That's a meaningful signal — it can reflect UC's track record with this school's graduates, students presenting strongly in UC's holistic review (essays, EC's, context), or institutional familiarity helping at the margin. The data can't distinguish which, but the pattern itself is real and worth understanding.
• ▸Senior-class enrollment is down 4% (308→297 from 2023 to 2026), outpacing the peer-group median of -9%.
• ▸In business terms, this is market-share growth during a market contraction. Los Angeles County's senior population shrank 9% over the same window — Castaic High School only shrank 4%. So Castaic High School picked up about 6 percentage points of relative share — families chose it over the alternatives even as the overall pool got smaller. That's overperforming the market in a shrinking market.
• ▸Enrollment has been growing (+24.2%/yr); projects to ~2196 by 2029.

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UC Reach = top-6 UC admits ÷ senior class. Sources: UCOP Admissions by Source School, CDE enrollment, IRS Form 990, NCES F-33. Test Prep Gurus Intelligence by Test Prep Gurus · Methodology

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