Confluence Trash Bash

The Confluence Trash Bash is an annual clean-up of the Missouri and Mississippi watersheds

As Missouri Stream Team #5, we see this as an extension of our annual Operation Clean Stream Program. We are happy to offer these opportunities throughout the St. Louis region each year.

Confluence Trash Bash 2024 is April 13th!

Create an account on our volunteer platform, volunteer.openspacestl.org, and ‘fan’ the CTB program to get notified when cleanup sites are posted! Registration goes live the last week of Febraury.

What to expect:

During the annual event, volunteers come together to help clean up the rivers and creeks within the Lower Missouri River watershed. Volunteers choose from multiple clean-up locations or storm drain marking sites each year. All clean-up opportunities have a site supervisor present to provide volunteers with supplies, sign-in participants and lead them through the clean-up of the chosen site.

All sites are given a grading scale to help you determine which location is best suited for each household for volunteer accessibility – Click Here to view the Clean Up Site – Grading Scale.

Volunteers are the backbone of our clean-ups, and we need your help in our continued efforts to protect and preserve our land and waterways. We know your time is valuable, but everyone deserves clean water. Look at the difference volunteers can make if everyone gave just one hour of their time. We could remove tons of trash, create a better habitat for wildlife, and protect our waterways from pollution so that everyone can enjoy the benefit of clean water!

Volunteers are always encouraged to take pictures and share them on social media using the #ConfluenceTrashBash so that everyone can join in the fun!


Click here to view the Complete Confluence Trash Bash 2023 Report 


Check out this video from The Greenway Network about why clean-ups like these are crucial in protecting our waterways.

To learn more about storm inlet marking, click here for a short informational video!

Questions about how to get involved? Please contact Hannah Gibson, Volunteer Program Manager, at hannah@openspacestl.org, or call our office at 314-835-9225


OS-STL is grateful for our Confluence Trash Bash partners who provide funding, guidance, and resources to make this event possible.