PublicGrades 9-12
Sentinel High School
121 South Reinway Avenue, Waterford, CA 95386-9629(209) 874-9017
Total Students14
Student/Teacher5.47:1
Graduation Rate83.3%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountyStanislaus
School DistrictWaterford Unified School District
Principal / AdminTonya Bibbins(209) 874-9017
Founded2008
Free/Reduced Lunch78.57% Eligible
Acceptance Rate100%
Student Demographics
White50%
Hispanic42.9%
Two Or More7.1%
Gender Distribution
85.7%
14.3%
Male Female
Students per Grade
Grade 112
Grade 1212
School Calendar 2026-2027
July 2026
Academic Schedule • 2026-2027
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Sentinel High School
Academic Calendar (2026-2027)
July 2026
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August 2026
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September 2026
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October 2026
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November 2026
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December 2026
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January 2027
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February 2027
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March 2027
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April 2027
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May 2027
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June 2027
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Key Dates & Holidays
Independence Day ObservanceJul 3
First Day of Instruction and Trimester/Quarter StartAug 10
Early Release Days for TK-6Aug 10
Labor Day ObservanceSep 7
End of First Quarter (Grades 7-12)Oct 9
End of First Trimester (TK-6)Nov 2
Veterans Day ObservanceNov 11
Early Dismissal Before Thanksgiving BreakNov 20
Thanksgiving RecessNov 23
End of Second Quarter/First Semester (Grades 7-12)Dec 17
Winter RecessDec 21
Winter Break ContinuationJan 1
Start of Third Quarter/Second Semester (Grades 7-12)Jan 6
Martin Luther King Jr. Day ObservanceJan 18
End of Second Trimester (TK-6)Feb 11
Presidents' Weekend ObservanceFeb 12
End of Third Quarter (Grades 7-12)Mar 12
District-Wide Early ReleaseMar 25
Good Friday ObservanceMar 26
Spring BreakMar 29
Spring Break ContinuationApr 1
Last Day of Instruction / End of SchoolMay 27
End of Third Trimester and Fourth QuarterMay 27
Memorial Day ObservanceMay 31
Summer Programs BeginJun 2
Juneteenth ObservanceJun 18
Key Dates & Holidays
2026-2027Community Reviews
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