Washington Park was designed by the Olmsted Brothers. It is located between the Montlake and Madison Park neighborhoods at 2300 Arboretum Drive E, 98112. It is 230 acres.
Nestled in a long and narrow valley, Washington Park’s most iconic Olmsted features include scenic Lake Washington Boulevard, designed from 1903–1907 as a north-south route connecting several parks along the lake shore, and the 230-acre arboretum, designed by James Frederick Dawson, a landscape architect in the Olmsted Brothers firm who did extensive work in Seattle, from 1934–1939. Its crowning feature, Azalea Way, is a gently winding meadow lined with its namesake flower.