Summary:
Castle Rock School District has one high school, Castle Rock High School, serving grades 9–12 and 422 students in the small community of Castle Rock, Washington.
Castle Rock High School has several encouraging outcomes for families to consider. Its 2024–25 graduation rate was 88.0%, higher than both the Castle Rock School District rate of 86.0% and the Washington rate of 82.6%. English Language Arts is the school’s strongest tested subject: 55.21% of students were proficient in 2025–26, compared with 36.39% districtwide and 52.81% statewide. ELA performance also improved by 5.74 percentage points from the prior year. The school’s reported 2023–24 dropout rate of 16.2% was below the district rate of 17.8%, although continued monitoring is important. The school ranking also improved from the 23rd percentile in 2024–25 to the 30th percentile in 2025–26, with its rating increasing from one star to two.
The most important concern at Castle Rock High School is mathematics. Only 16.67% of students were proficient in 2025–26, compared with 27.20% in the district and 43.11% statewide; the school’s rate also declined from 20.00% the previous year. Science was another area needing improvement, with 37.65% proficiency versus 48.62% districtwide and 50.95% statewide. Overall, the school offers a stronger graduation and literacy profile than its assessment results in math and science suggest. Families may want to ask about math intervention, science support, tutoring, course completion, and how the school is sustaining its recent ELA gains. Because enrollment is relatively small, yearly percentages may shift noticeably when the performance of a limited number of students changes.
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