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Founded in 1934 and designed by the famed Olmsted Brothers firm, Washington Park Arboretum contains one of the most diverse and important plant collections in North America displayed among 230 acres of woodlands, wetlands, gardens, and walking trails. Located on the western shore of Lake Washington, just a few miles from downtown Seattle, it is open seven days a week and free to the public.

The Arboretum features more than 40,000 plants, including 10,000 trees. It is internationally renowned for its collection of oaks, conifers, camellias, Japanese maples, and hollies. It also is home to the Seattle Japanese Garden, one of the most celebrated Japanese gardens outside of Japan. New features include the ecogeographic gardens and forests of Pacific Connections and the two-mile, multi-use Arboretum Loop Trail

The Arboretum is a dynamic partnership between Seattle Parks and Recreation, University of Washington Botanic Gardens, and the Arboretum Foundation.

Active Projects


Contact Us

Have questions or want to learn more about a project, contact us below:

Contact Information
Phone (206) 684-4075
Email EngageParks@seattle.gov
Website www.seattle.gov