Mount Diablo High School

• ▸On UC Reach Score, Mount Diablo High School sits near the bottom of its similar-school group (ranked #11 of 11): 5 vs. a peer median of 28.
• ▸Mount Diablo High School's UC Reach Score has stepped down from a peak of 12 in 2022 to 5 in 2025 — a 6-point decline worth tracking.
• ▸Across the top-6 UC campuses, Mount Diablo High School is admitting at roughly +7 percentage points above what its average applicant GPA (3.7) alone would predict (37% actual vs. 30% 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 up 3% (303→312 from 2018 to 2026), outpacing the peer-group median of -10%.
• ▸At its recent rate (-0.4%/yr), enrollment projects to ~1372 by 2029 — about 17 fewer students than today.

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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. Reach — by Test Prep Gurus · Methodology

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