Washington Park Arboretum
2300 Arboretum Dr. E
About
Washington Park Arboretum, 2300 Arboretum Dr. E (from 40th Ave. and E. Madison on the south to Lake Washington and SR-520 on the north), [8]. Open daily, dawn to dusk.. The Arboretum is a 230-acre park additionally serving as a botanical garden and horticultural research center, with thousands of trees and plants from temperate climates represented. An extensive network of walking trails covers the park. The Visitor's Center, near the northeast corner of the park, is open from 10 AM to 4 PM daily, and has limited parking available. Guided tours are offered on the first and third Sundays of every month, and free trail maps highlighting the major parts of the collection are available at any time.