Protecting & Enhancing a Northwest Treasure

Members, donors, visitors, and volunteers have helped make the Washington Park Arboretum a Northwest treasure since its founding in 1934. The Arboretum Foundation invites you to explore the Arboretum’s 230 acres and join in our mission to protect and enhance this spectacular urban green space and world-class plant collection.

Learn about our mission and vision

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40,000

The number of plants being cared for by Arboretum arborists and gardeners.

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7,000

Number of children who participate in  the environmental education program each year.

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$1.32M

The amount we gave our partners in 2021-22 to support the Arboretum.

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6,000+

The number of hours our volunteers contributed in 2021.

News Articles

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Rhododendron Glen Stream Restoration Begins This Month

Rhododendron Glen Stream Restoration Begins This Month

New astilbes in bloom along the upper stream in Rhododendron Glen.The Arboretum has made great progress on plant collection restoration in Rhododendron Glen over the last three years, but the stream restoration portion of the project has been delayed due to a...

REI Hosts Huge Work-Service Event at the Arboretum

REI Hosts Huge Work-Service Event at the Arboretum

Volunteers in the wetlands beside South Azalea Way.More than 100 volunteers from REI helped care for the Arboretum on Thursday, July 21 during one of the company's regular work-service events. The group members were all from REI's IT division and included folks who...

Olmsted and the Washington Park Arboretum

Olmsted and the Washington Park Arboretum

PHOTO: Azalea Way, the centerpiece of the Olmsted design of Washington Park Arboretum. This year marks the 20oth anniversary of the birth of Frederick Law Olmsted. Numerous celebrations are taking place around the country to mark the bicentennial of this iconic...

2022 Annual Meeting Report

2022 Annual Meeting Report

We had a good turnout for our Annual Meeting on June 15—our first in-person version of the event in three years! More than 70 Arboretum Foundation members joined us to hear about our fiscal-year accomplishments, listen to updates from our UW and City partners, and...

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Read about our 2021–22 fiscal year accomplishments.

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