Big Sioux River Greenway Cleanup
- City of Sioux Falls
- Sioux Fals , SD United States
9am-Noon. Volunteers choose a park and collect trash along the Big Sioux River. Nine parks to choose from: Dunham Park, Rotary Park, Elmen Park Trailhead, Sertoma Park, Falls Park, Spencer Park, Fawick Park, Yankton Trail Park, and Legacy Park. Last year over 5,000 pounds of trash and recyclables from the banks of the Big Sioux River were collected.