Sonoma Mountain High School is one of three alternative schools in Petaluma, California. It is located on the Casa Grande High School campus. There are, on average, 32 pupils enrolled at Sonoma Mountain High School at any given time. About 6 pupils graduate every year.
Serving 21 students in grades 9-12, Sonoma Mountain High (Necessary Small School) ranks in the top 30% of all schools in California for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is <50% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is ≥50% (which is higher than the California state average of 47%).
The student-teacher ratio of 11:1 is lower than the California state level of 21:1.
Minority enrollment is 24% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- School Type: Alternative school
- Grades: 9-12
- Enrollment: 21 students
- Student-Teacher Ratio: 11:1
- Minority Enrollment: 24%
- Graduation Rate: ≥50% (Btm 50% in CA)
- Overall Testing Rank: Top 30%
- Math Proficiency: <50% (Top 30%)
- Reading Proficiency: ≥50% (Top 50%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Sonoma Mountain High (Necessary Small School) ranks among the top 20% of public schools in California for:
Category
Attribute
Most improved public schools
Community Size
Student Attention
School Overview
Sonoma Mountain High (Necessary Small School)'s student population of 21 students has declined by 34% over five school years.
The teacher population of 2 teachers has stayed relatively flat over five school years.
School Type
Grades Offered
Grades 9-12
Total Students
21 students
Total Classroom Teachers
2 teachers
School Calendar
School Rankings
Sonoma Mountain High (Necessary Small School) ranks within the top 30% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Sonoma Mountain High (Necessary Small School) is 0.39, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#2505 out of 9523 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
<50%
34%
Reading/Language Arts Test Scores (% Proficient)
≥50%
47%
Student-Teacher Ratio
11:1
21:1
Hispanic
19%
56%
White
76%
20%
Two or more races
5%
6%
All Ethnic Groups
Graduation Rate
≥50%
87%
Chronically Absent Students
(22-23)100%
27.7%
Eligible for Free Lunch
52%
54%
Eligible for Reduced Lunch
19%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Sonoma Mountain High (Necessary Small School)'s ranking?
Sonoma Mountain High (Necessary Small School) is ranked #2505 out of 9,523 schools, which ranks it among the top 30% of public schools in California.
What percent of students have achieved state testing proficiency in math and reading?
<50% of students have achieved math proficiency (compared to the 34% CA state average), while ≥50% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Sonoma Mountain High (Necessary Small School)?
The graduation rate of Sonoma Mountain High (Necessary Small School) is 50%, which is lower than the California state average of 87%.
How many students attend Sonoma Mountain High (Necessary Small School)?
21 students attend Sonoma Mountain High (Necessary Small School).
What is the racial composition of the student body?
76% of Sonoma Mountain High (Necessary Small School) students are White, 19% of students are Hispanic, and 5% of students are Two or more races.
What is the student-teacher ratio of Sonoma Mountain High (Necessary Small School)?
Sonoma Mountain High (Necessary Small School) has a student ration of 11:1, which is lower than the California state average of 21:1.
What grades does Sonoma Mountain High (Necessary Small School) offer ?
Sonoma Mountain High (Necessary Small School) offers enrollment in grades 9-12
What school district is Sonoma Mountain High (Necessary Small School) part of?
Sonoma Mountain High (Necessary Small School) is part of Petaluma Joint Union High School District.
School Reviews
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