Colorado has 173 school districts across 116 cities with calendar data for the 2025-26 school year. Districts average 168 instructional days per year.
Academic Calendar Overview
Colorado school districts follow a 2025-26 academic calendar that spans from August 4, 2025 through July 31, 2026. With 173 districts across 116 cities and communities, Colorado families have a wide range of schedules to navigate depending on where they live. Understanding when school starts, when breaks fall, and how many instructional days your child will have helps parents plan vacations, childcare, and family activities around the academic year. With an average of 168 instructional days required per year, Colorado school districts must carefully balance state mandates with local scheduling needs, including teacher planning days, professional development, and weather makeup days.
When Does School Start?
The earliest Colorado districts begin classes on August 4, 2025, while others do not start until September 2, 2025 — a spread of 29 days that reflects the diverse local priorities and climate conditions across the state. Districts that start earlier in the summer tend to align breaks with local events or agricultural cycles, while later-starting districts may preserve more of the traditional summer for families. This variation means a family moving from one Colorado district to another could encounter a schedule shift of several weeks, making it important to verify your specific district's calendar each year. Across Colorado, districts average 168 instructional days — a figure set by state education mandates but often exceeded by individual districts that build in additional learning time.
Break Schedules
For the 2025-26 academic year, the most common spring break window in Colorado runs from March 16, 2026 through March 20, 2026, a schedule shared by 41 districts. Families planning spring travel should be aware that while this is the dominant pattern, not all Colorado districts follow the same dates — some districts schedule spring break a week earlier or later based on local traditions or the academic calendar layout. Winter break — the longest scheduled recess of the school year — most commonly begins December 22, 2025 and runs through January 2, 2026 for 84 Colorado districts. This multi-week window is a critical planning period for families booking holiday travel, managing childcare during the break, and coordinating with extended family schedules.
Data Sources & Accuracy
Major Colorado communities including Deer Trail, Swink, Otis, and Monte Vista are represented in our dataset, alongside hundreds of smaller districts across the state. All calendar data on this site is sourced directly from official Colorado school district websites, PDF calendars, and district-published iCal feeds. The data is refreshed regularly to reflect mid-year amendments, snow day adjustments, and any changes announced by districts after the start of the school year. While we work to keep information current, parents should always verify critical dates — such as the first day of school, standardized testing windows, and graduation ceremonies — against their district's official website or the district office directly. Use the district links below to navigate to your specific school calendar page, where you can view the full schedule and download an iCal file for Apple Calendar, Google Calendar, or Outlook.
Top Cities by District Count
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Frequently Asked Questions
When does school start in Colorado?
For the 2025-26 school year, the first day of school in Colorado ranges from August 4, 2025 to September 2, 2025, depending on the district. Check individual district calendars below for exact dates.
When is the last day of school in Colorado?
The last day of school in Colorado for 2025-26 ranges from May 14, 2026 to July 31, 2026. Each district sets its own end date based on local scheduling.
When is spring break in Colorado?
The most common spring break dates in Colorado for 2025-26 are March 16, 2026 to March 20, 2026, shared by 41 districts. Other districts may have different dates — check your district's calendar for exact spring break timing.
How many school districts are in Colorado?
We have calendar data for 173 school districts in Colorado, spanning 116 cities. The average school year includes 168 instructional days.