PublicGrades K-5
Castle Rock Elementary School
2975 Castle Rock Road, Diamond Bar, CA 91765-3420(909) 598-5006
Total Students684
Student/Teacher26.11:1
Math Prof.70.5%
Reading Prof.71.19%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountyLos Angeles
School DistrictWalnut Valley Unified School District
Principal / AdminElizabeth Chang(909) 598-5006
Founded1980
Free/Reduced Lunch26.61% Eligible
Acceptance Rate100%
Student Demographics
White2.9%
Hispanic19.3%
Black1.5%
Asian70.2%
Native American0.1%
Pacific Islander0.6%
Two Or More5.4%
Gender Distribution
52.9%
47.1%
Male Female
Students per Grade
Grade 176
Grade 2102
Grade 3101
Grade 4137
Grade 5137
School Calendar 2026-2027
August 2026
Academic Schedule • 2026-2027
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Castle Rock Elementary 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
First Day of SchoolAug 10
Start of First Grading PeriodAug 10
Labor Day HolidaySep 7
End of First QuarterOct 9
Veterans Day HolidayNov 11
Thanksgiving Recess BreakNov 23
End of First SemesterDec 17
Modified School Day (Semester End)Dec 17
Winter RecessDec 21
New Year's Day HolidayJan 1
Student Holiday / Teacher Work DayJan 4
Start of Second SemesterJan 5
Martin Luther King Jr. Day HolidayJan 18
Presidents Day HolidayFeb 15
End of Third QuarterMar 5
Student Holiday / Staff Development DayMar 5
Spring Recess Break BeginsMar 26
Spring Recess Break EndsApr 2
Last Day of SchoolMay 27
Modified School Day (Last Day)May 27
End of Second SemesterMay 27
Memorial Day HolidayMay 31
Key Dates & Holidays
2026-2027Community Reviews
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