Washington · Est. 1934
Washington Park Arboretum
A 230-acre sanctuary of diverse plant collections and scenic trails in the heart of Seattle.
Founded
1934
Size
230 acres
Hardiness Zone
USDA Zone 8b
Best Season
April to May for spring blooms, and October to November for fall foliage.
About Washington Park Arboretum
The Washington Park Arboretum is a 230-acre botanical garden jointly managed by the University of Washington and the City of Seattle. It features a world-class collection of woody plants, including rare and endangered species from around the globe. The arboretum serves as a living museum, offering educational programs, conservation efforts, and a tranquil retreat for nature enthusiasts.
History & Heritage
Established in 1934, the Washington Park Arboretum was designed by the renowned Olmsted Brothers landscape architecture firm. The site was originally a logged-over area and a former horse racing track before being transformed into a botanical garden. Over the decades, it has grown to house thousands of plant species and remains a significant horticultural and historical landmark in the Pacific Northwest.
Signature Feature
Azalea Way
Azalea Way is a 3/4-mile pedestrian path that serves as the historic centerpiece of the arboretum. Developed in the late 1930s, it bursts into vibrant colors each spring with thousands of blooming azaleas, rhododendrons, and flowering cherries. The picturesque trail offers a stunning floral display and is a favorite destination for visitors and photographers.
Photo Gallery
Vibrant spring blooms along Azalea Way.
Tranquil scenery in the Japanese Garden.
Lush greenery and diverse tree collections.
Notable Collections
Japanese Garden
A 3.5-acre traditional Japanese stroll garden featuring authentic landscaping, water features, and a teahouse.
Pacific Connections Garden
Showcases plants from five Pacific Rim regions: Cascadia, Chile, China, New Zealand, and Australia.
Joseph A. Witt Winter Garden
Highlights plants with striking winter interest, including fragrant flowers, colorful bark, and unique foliage.
Woodland Garden
Features one of the largest collections of Japanese maples in North America, offering spectacular autumn colors.
Recognition & Awards
- Recognized as a Level IV Arboretum by the ArbNet Arboretum Accreditation Program
- Recipient of the American Public Gardens Association Award for Program Excellence
Editorial Standards
This profile was researched and written by the BotanicalGardens.blog editorial team, which includes certified Master Gardeners and horticultural writers with field experience across the United States. All admission prices, hours, and garden details are verified against official garden websites and updated May 2026. If you notice an inaccuracy, please contact us.
Plan Your Visit
April to May for spring blooms, and October to November for fall foliage.
Address
2300 Arboretum Drive E, Seattle, WA 98112
Phone
(206) 543-8800
Hours
Open daily from dawn to 8:00 PM.
Admission
Free admission to the main arboretum; fee required for the Japanese Garden.
Insider Tips
- 1Stop by the Graham Visitors Center for maps and current trail information.
- 2Wear comfortable walking shoes as the terrain can be uneven on unpaved trails.
- 3Bring a camera to capture the stunning seasonal displays, especially along Azalea Way.
- 4Consider booking a guided tour to learn more about the diverse plant collections.
Nearby Attractions
- Seattle Japanese Garden (0.1 miles)
- Museum of History & Industry (MOHAI) (2.5 miles)
- Pike Place Market (3.5 miles)