PublicGrades 10-12
Sonoma Mountain High (Necessary Small School)
299 Casa Grande Road, Petaluma, CA 94954-5604(707) 778-4738
Total Students21
Student/Teacher10.66:1
Graduation Rate81.8%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountySonoma
School DistrictPetaluma Joint Union High School District
Principal / AdminDave Anderson(707) 778-4738
Founded1992
Free/Reduced Lunch71.43% Eligible
Acceptance Rate100%
Student Demographics
White76.2%
Hispanic19%
Two Or More4.8%
Gender Distribution
42.9%
57.1%
Male Female
Students per Grade
Grade 93
Grade 102
Grade 117
Grade 129
School Calendar 2026-2027
July 2026
Academic Schedule • 2026-2027
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Sonoma Mountain High (Necessary Small 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 SchoolAug 12
Labor Day HolidaySep 7
Thanksgiving BreakNov 23
Winter RecessDec 21
New Year's Day ObservanceJan 1
Martin Luther King Jr. HolidayJan 18
Presidents' Day HolidayFeb 15
Lincoln's Birthday ObservanceFeb 16
Mid-Winter Break Make-up DaysFeb 17
Spring BreakApr 5
Memorial Day HolidayMay 31
Last Day of SchoolJun 4
Juneteenth Holiday ObservanceJun 18
Key Dates & Holidays
2026-2027Community Reviews
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