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Portland has been celebrating Arbor Day since 1889 - bringing communities together to recognize the importance and value of trees. The trees of our city provide essential services - making a healthier and more equitable place to live for all Portlanders.
Portland Arbor Day 2026
We are celebrating Arbor Day on October 17, 2026, at Harrison Park in partnership with APANO. Learn more about the event.
Portland Celebrates Arbor Day in October
Due to our changing climate, Portland’s hot dry summers have made it more difficult for trees planted in April to succeed. By moving Arbor Day to October, we can plant new trees and take advantage of our nice wet winter months to help them get established. We are excited about this change and to provide an opportunity to work with Portlanders to plant new trees and give them the best opportunity to thrive.
More Arbor Day Information
Learn about the Bill Naito Award
Portland Arbor Day 2025
We celebrated Arbor Day on October 18, 2025, at Sacajawea Head Start. Thank you to all who showed up!
Learn more about last year's event.