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About News Volunteer Calendar Support Shop More Join SOLVE39s legacy of action since 1969 uniting thousands in Oregon and Southwest Washington to restore and protect our environment for future generations. Upcoming Events Celebrate Earth Day Detrash Portland April 22 2025 Celebrate Earth Day by giving back to our beautiful city with a litter cleanup at Tom McCall Waterfront Park. Oregon Spring Cleanup April 12 22 2025 Join our Earth Day festivities across the region for a week of inspiring environmental projects culminating in a collective celebration on Saturday April 19. Waterway Cleanup Series May October Help protect the health of our local rivers streams and creeks with this annual summerlong series.