PublicCharterVirtualGrades K-12
Granite Mountain Charter School
8560 Aliento Road, Lucerne Valley, CA 92356-8133(909) 906-3593
Total Students4,393
Student/Teacher26.77:1
Math Prof.31.04%
Reading Prof.46.77%
Graduation Rate93.9%
School Information
Charter SchoolYes
Magnet SchoolNo
Virtual SchoolYes
CountySan Bernardino
School DistrictLucerne Valley Unified School District
Principal / AdminBrook MacMillan(909) 906-3593
Founded2019
Free/Reduced Lunch39.88% Eligible
Acceptance Rate100%
Student Demographics
White34.8%
Hispanic48.2%
Black3.4%
Asian4.4%
Native American0.4%
Pacific Islander0.3%
Two Or More8.5%
Gender Distribution
50.7%
49.3%
Male Female
Students per Grade
Grade 1478
Grade 2377
Grade 3448
Grade 4413
Grade 5396
Grade 6360
Grade 7371
Grade 8303
Grade 9183
Grade 10169
Grade 11153
Grade 12109
School Calendar 2026-2027
July 2026
Academic Schedule • 2026-2027
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Granite Mountain Charter 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
Fourth of July ObservanceJul 3
First Day of SchoolAug 24
Labor Day HolidaySep 7
End of Learning Period AssessmentOct 2
Fall RecessOct 12
Veterans Day HolidayNov 11
End of Learning PeriodNov 13
Thanksgiving Multi-Day RecessNov 20
End of Learning PeriodDec 18
Winter RecessDec 21
Martin Luther King Jr Day HolidayJan 18
Second Semester StartJan 26
End of Learning PeriodFeb 5
President's HolidayFeb 12
End of Learning PeriodMar 19
Spring RecessMar 29
End of Learning PeriodMay 7
Memorial Day HolidayMay 31
Last Day of SchoolJun 11
Final Learning Period AssessmentJun 11
Juneteenth ObservanceJun 18
Key Dates & Holidays
2026-2027Community Reviews
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