Hillsdale High
#52
Best ACT in California High Schools
1,629
Students
17.6:1
S:T Ratio
School Snapshot
Key metrics at a glance1,330
A
29
A
17
A
19%
C
18:1
B
91%
A+
This Week at Hillsdale High – June 18, 2026
213 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Hillsdale High
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Hillsdale High.
National Tests
June 20, 2026 – July 4, 2026
SAT Score Release Date
June 23, 2026
ACT
June 24, 2026
ACT
July 1, 2026 – July 31, 2026
AP Score Release — All
July 6, 2026
ACT Photo Upload/Standby Deadline
July 11, 2026
ACT — National
State Assessments
January 1, 2026 – June 30, 2026
Smarter Balanced Summative Assessment
School Milestones
October 1, 2026 – October 15, 2026
Private School Affidavit Filing Window
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3115 Del Monte St., San Mateo, CA 94403
(650)558-2699
San Mateo Union High School District