The Do-It-Yourself Watershd Cleanup Challenge Every year we host an annual fall cleanup, but we have heard that one cleanup weekend is hard to catch! So we are giving everyone a chance to participate all month long.Starting August 21st, through September 19th You can log you how much trash you pick up and where for the chance to win prizes and be featured on our website and Instagram. Clean up the Gallatin at your own pace on your own time! Because of you, we can increase our impact by cleaning up additional sites across the watershed. What to Expect if you are Leading a Cleanup Team Team leaders have a few responsibilities before, during, and after the watershed cleanup. Read on to see how you can make things run smoothly.