PublicGrades 9-12
Menlo-Atherton High School
555 Middlefield Road, Atherton, CA 94025-3438(650) 322-5311
Total Students2,158
Student/Teacher17.94:1
Math Prof.50.87%
Reading Prof.69.32%
Graduation Rate90.7%
School Information
Charter SchoolNo
Magnet SchoolNo
Virtual SchoolNo
CountySan Mateo
School DistrictSequoia Union High School District
Principal / AdminKarl Losekoot(650) 322-5311
Founded1980
Free/Reduced Lunch32.99% Eligible
Acceptance Rate100%
Student Demographics
White34.6%
Hispanic42.5%
Black3.2%
Asian8.3%
Native American1.7%
Pacific Islander4.4%
Two Or More5.1%
Gender Distribution
52.3%
47.7%
Male Female
Students per Grade
Grade 9500
Grade 10559
Grade 11528
Grade 12571
School Calendar 2026-2027
August 2026
Academic Schedule • 2026-2027
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Pre-School Days
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Pre-School Days
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First Day of Classes
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Menlo-Atherton 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
Pre-School DaysAug 10
First Day of ClassesAug 12
Labor Day HolidaySep 7
Professional Development DaysSep 28
First Quarter Grading Period EndsOct 9
Indigenous Peoples Day HolidayOct 12
Veteran's Day HolidayNov 11
Thanksgiving Holiday BreakNov 23
Second Quarter Grading Period EndsDec 17
Winter BreakDec 21
Winter Break ContinuationJan 1
Site Professional Development DayJan 4
Second Semester BeginsJan 5
Martin Luther King Jr. HolidayJan 18
End of Third Quarter Progress Report PeriodFeb 5
Mid-Winter BreakFeb 15
Professional Development DayMar 1
Third Quarter Grading Period EndsMar 19
Spring BreakApr 12
End of Fourth Quarter Progress Report PeriodApr 30
Memorial Day HolidayMay 31
Fourth Quarter Grading Period EndsJun 3
Last Day of ClassesJun 3
Juneteenth Holiday ObservedJun 18
Key Dates & Holidays
2026-2027Community Reviews
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