Hollister Lake Elementary

Hollister Lake Elementary is a PK-5 school in Windsor, CO, serving 529 students as part of the Weld County Reorganized School District Re-4, a district ranked 19th among 115 districts in Colorado. The school's own standing is more modest: it holds a 2-star rating at the 48th percentile of Colorado elementary schools. On the 2025-2026 CMAS assessments, Hollister Lake posted proficiency rates of 41.3% in English Language Arts, 36.8% in math, and 32.8% in 5th grade science — all below district averages, with ELA and science also trailing state averages.

Compared with nearby elementary schools, Hollister Lake ranks at or near the bottom. Its ELA proficiency is the lowest of any same-district elementary school with test data: 41.3% versus 69.8% at Windsor Charter Academy Elementary School and 55.7% at Grandview Elementary School. Math proficiency is also weak, with only American Legacy Academy posting a lower rate. Science shows a similar pattern: 32.8% proficient versus the district's 47.0%, while Orchard Hill Elementary and Mountain View Elementary both exceed 50%.

The most urgent concern is early literacy: just 29.9% of 3rd graders reached ELA proficiency, compared with 46.5% districtwide. The bright spot is 5th grade, where ELA proficiency reached 58.3% — above both district and state averages — suggesting upper-grade instruction is a relative strength. Poverty alone doesn't explain the gaps: Hollister Lake's 27% free/reduced lunch rate is similar to Bamford Elementary School's, yet Bamford outperforms it substantially. Finally, subgroup effectiveness ranks at Hollister Lake fall below the school's overall percentile, signaling that academic outcomes are not consistent across all groups of students.