Great Willamette Cleanup hosted by Willamette Riverkeeper Saturday, October 10, 2026 9:00 AM 4:00 PM 09:00 16:00 Google Calendar ICS Join Willamette Riverkeeper for the Great Willamette Cleanup at multiple places on the river we love on this Saturday October 10. For details, and where you can join people on the river, see: The Great Willamette Cleanup