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Prospect Mountain High School

Public Grades 9-12
69th
SchoolDigger Rank ?
of 89 New Hampshire High Schools
Better than 22% of New Hampshire high schools
Summary

Prospect Mountain High School is a public school serving grades 9–12 in Alton, New Hampshire, with approximately 402 students in the relatively small Prospect Mountain JMA School District. Its size may allow for personal relationships and targeted support, although smaller schools can have fewer course options and test results that shift noticeably from year to year. The school is currently ranked 69th out of 89 New Hampshire high schools, a substantial decline from 33rd the previous year.

Academic results are mixed. Reading is the clearest strength: 56% of students reached proficiency, roughly matching the state rate and exceeding results at Laconia High School and Farmington Senior High School. Mathematics is the major concern, with only 13% proficient compared with 44% statewide; science performance was also below average at 30%. These results place Prospect Mountain behind stronger nearby schools such as Gilford High School and Coe-Brown Northwood Academy, while its overall standing is similar to Belmont High School, Kingswood Regional High School, and Laconia.

Graduation outcomes provide an important positive counterpoint: the 2024–2025 graduation rate was 89.5%, above New Hampshire’s 87.0% rate, and the dropout rate matched the state at 2.3%. The student-teacher ratio was a favorable 11.1 to 1, comparable to or better than many nearby schools, including Spaulding High School. For families, the central issue is the contrast between solid student completion and weak current math and science performance. The most important questions for the school are how it is strengthening math instruction, restoring science results, and addressing the sharp year-to-year swings in academic performance.

402
Students ?
11.1
Student/teacher ratio ?
21.1%
Free/discounted lunch ?
 242 Suncook Valley Rd.
       Alton, NH  03809-4629

(603) 875-3800

District: Prospect Mountain JMA School District


Feeder schools for Prospect Mountain High School:

Elementary:    Alton Central School (Elem)
    Barnstead Elementary School
Racial breakdown:

White:
93.0%
Hispanic:
3.0%
Two or more races:
2.5%
more
 See top rated New Hampshire high schools

 Compare Prospect Mountain High School to nearby high schools!
At a glance
▼ Ranking trend: Declining — 68th percentile in 2016 → 22nd in 2026
Strengths
✓Small classes — about 11 students per teacher
Worth a look
!Test scores below the New Hampshire average (34% vs 46% meeting standards)
!In the lower quartile statewide (22nd percentile)
!Ranking has slipped — down 46 percentile points since 2016
Students meeting standards (2025-2026) ?
This school34%
District avg34%
New Hampshire avg46%
69th of 89
New Hampshire public high schools ?
Bottom 22%▼ down 45 pts since 2016
From top 32% (2016) to bottom 22% (2026)
See the entire ranking list of New Hampshire High Schools →
★★★★★
SchoolDigger rating ?
140th of 166Prospect Mountain JMA School District among New Hampshire districts
Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)
Show full rank history (all student groups)

All Students

YearAvg scoreStatewide rankNew Hampshire percentileRating
202628.769 of 8922.5%★☆☆☆☆
202552.833 of 8661.6%★★★☆☆
202438.149 of 8743.7%★★☆☆☆
202347.838 of 8555.3%★★★☆☆
202243.344 of 8548.2%★★★☆☆
202141.649 of 8441.7%★★☆☆☆
201937.049 of 7131.0%★★☆☆☆
201842.248 of 8140.7%★★☆☆☆
201757.538 of 8253.7%★★★☆☆
201664.127 of 8467.9%★★★★☆
201567.225 of 7767.5%★★★☆☆
201457.136 of 8557.6%★★★☆☆
201359.330 of 8363.9%★★★☆☆
201261.327 of 8367.5%★★★★☆
201134.861 of 8124.7%★☆☆☆☆
201051.842 of 8148.1%★★☆☆☆
200944.447 of 7940.5%★★☆☆☆

Female

YearAvg scoreStatewide rankNew Hampshire percentileRating
202624.066 of 8017.5%★☆☆☆☆
202552.132 of 8060.0%★★★☆☆
202453.934 of 8158.0%★★★☆☆
202350.735 of 7855.1%★★★☆☆
202224.862 of 7921.5%★☆☆☆☆
202129.941 of 5930.5%★★☆☆☆
201956.123 of 6363.5%★★★☆☆
201851.827 of 6055.0%★★★☆☆

Male

YearAvg scoreStatewide rankNew Hampshire percentileRating
202635.351 of 8137.0%★★☆☆☆
202549.236 of 7853.8%★★★☆☆
202428.558 of 8229.3%★★☆☆☆
202346.335 of 7855.1%★★★☆☆
202267.520 of 7874.4%★★★★☆
202151.826 of 6056.7%★★★☆☆
201917.852 of 6114.8%★☆☆☆☆
201833.140 of 6134.4%★★☆☆☆

Special Education

YearAvg scoreStatewide rankNew Hampshire percentileRating
202627.122 of 3333.3%★★☆☆☆
202596.22 of 3594.3%★★★★★
201933.623 of 3125.8%★☆☆☆☆

White

YearAvg scoreStatewide rankNew Hampshire percentileRating
202627.169 of 8821.6%★☆☆☆☆
202556.927 of 8668.6%★★★★☆
202436.053 of 8739.1%★★☆☆☆
202345.438 of 8354.2%★★★☆☆
202245.441 of 8551.8%★★★☆☆
202135.838 of 6743.3%★★☆☆☆
201933.644 of 6633.3%★★☆☆☆
201840.633 of 6448.4%★★★☆☆
How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)
Male (2026)37th percentile+15 vs school
Special Education (2026)33rd percentile+11 vs school
White (2026)22nd percentile~ school
Female (2026)18th percentile-5 vs school
By subject vs New Hampshire (2025-2026) ?
Reading56%~ state avg
Science30%-8 vs state
Mathematics13%-31 vs state

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Frequently Asked Questions about Prospect Mountain High School

In the 2024-25 school year, 402 students attended Prospect Mountain High School.

Prospect Mountain High School is fed by the following schools:

Elementary : Alton Central School (Elem)
Elementary : Barnstead Elementary School

Prospect Mountain High School ranks in the bottom 22.5% of New Hampshire high schools.

Students at Prospect Mountain High School are 93% White, 3% Hispanic, 2% Two or more races.

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Latest New Hampshire data All new data »
2025–26 NH SAS & SAT test scoresSep 7, 2026
2024–25 dropout rates & graduation ratesNov 12, 2025
2024–25 NH SAS & SAT test scoresSep 6, 2025
2015–16 through 2023–24 dropout rates & graduation ratesJul 30, 2025


SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the New Hampshire Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.

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