This street first appeared in 1890 as part of Yesler’s Third Addition to the City of Seattle, and ran two blocks from what is now E Alder Street to the north end of what is now Leschi Park. It was so named for running along the Lake Washington shoreline.

Today, Lakeside Avenue begins a block further south, where Lake Washington Boulevard leaves the shoreline and begins winding its way through Leschi and Frink Parks. It becomes Lakeside Avenue S at the north end of Leschi Park, and ends where Lake Washington Boulevard S rejoins the shoreline at Colman Beach, for a total distance of 1¼ miles.

Leschi Marina
Leschi Marina from Lakeside Avenue S, April 30, 2007. Photograph by Joe Mabel, Wikimedia Commons, licensed under Creative Commons Attribution-Share Alike 3.0 Unported.