Summary:
Zip code 86440 has one high school, River Valley High School, serving grades 9–12 and enrolling 585 students. Its reported test results are below state averages in every subject and grade comparison. Mathematics is the clearest concern: proficiency was 14% at all grades, 19 points below the state’s 33%.
There is no second local high school to rank against it, so River Valley is both the area’s only option and its top and bottom school in a school-to-school comparison. Its results look stronger relative to the Colorado River Union High School District: ELA was 28%, 4 points above the district’s 24%; math was 14%, equal to the district; and grade 11 science was 13%, 1 point above the district’s 12%. Still, River Valley trailed the state in each: ELA was 28% versus 41% at all grades and 28% versus 38% in grade 11, while grade 11 science was 13% versus 19%. ELA is a relative strength compared with math, but it also remains below state results.
SchoolDigger’s ranking history shows improved relative standing, though it does not establish that test proficiency increased. The school moved from 246 of 270 schools and percentile 9 in 2023–24 to 190 of 256 and percentile 26 in 2025–26; its rating rose from 0 stars to 1 star and has remained at 1 star since 2024–25. The student–teacher ratio was 20.1 in 2024–25. The listed graduation rate was 96% in 2021–22, and the dropout rate was 3% in 2022–23. No free/reduced-lunch rate is provided, and the graduation and dropout figures are from different years than the test results.
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