The Greatest American
Cleanup
2026 MARCH - MAY
Colorado’s 150: A Cleaner Future
250 years of America.
150 years of Colorado.
One generation to make a difference.
Join Keep Colorado Beautiful in making this the greatest cleanup in Colorado history.
The 2026 Greatest American Cleanup is Here! Register your event or find an event near you to volunteer.
Keep America Beautiful’s Great American Cleanup in Colorado takes place each spring from March through May and is the nation’s largest community improvement effort. Thousands of volunteers, including students, work together to clean up and enhance their communities, making the state a more beautiful place to live, work and play.
After your cleanup event, fill out and submit a Wrap-Up Report within 10 days to share your results with Keep Colorado Beautiful.
250 Years of America & 150 Years of Colorado
As America turns 250, Colorado approaches its 150th birthday in 2026. From our mountain towns to our urban corridors, from the plains to the Western Slope, this is our opportunity to celebrate Colorado’s legacy of independence, resilience, and outdoor stewardship by caring for the places that define us.
A Once in a Generation Moment
The Greatest American Cleanup is more than a series of litter pickups. It is a statewide movement designed to:
Remove litter and debris from roadsides, parks, waterways, and public spaces
Restore and beautify neighborhoods and community gathering places
Collect data to identify litter hotspots and inform prevention strategies
Inspire civic pride and long term stewardship across Colorado
Our goal is bold: mobilize thousands of Coloradans in coordinated cleanups across all regions of the state leading up to Colorado’s 150th anniversary.
Colorado’s 150:
A Cleaner Future
As we celebrate 150 years of Colorado statehood, we are asking a simple but powerful question:
What will we pass on to the next 150 years?
Through the Greatest American Cleanup, we are honoring Colorado’s past while building a cleaner, stronger future. Every bag of litter removed, every tree planted, and every volunteer engaged is a gift to the next generation.
This is a statewide investment in litter prevention, education, civic pride, and community elevation.