Like Hunter Boulevard S, Mount Rainier Drive S, Mount St. Helens Place S, Mount Adams Place S, and S Mount Baker Boulevard, this street was created in 1907 as part of the Hunter Tract Improvement Company’s Mt. Baker Park addition, named for its view of Mount Baker in the North Cascades. Unlike the others, this one was named after the entire Cascade Range, itself named for the no longer extant Cascades Rapids on the Columbia River, submerged by the construction of the Bonneville Dam in the 1930s.
Cascadia Avenue S begins at the intersection of Mount Baker Drive S and Mount Claire Drive S and goes 1⅖ of a mile southeast, then south, to S Conover Way.
Born and raised in Seattle, Benjamin Donguk Lukoff had his interest in local history kindled at the age of six, when his father bought him settler granddaughter Sophie Frye Bass’s Pig-Tail Days in Old Seattle at the gift shop of the Museum of History and Industry. He studied English, Russian, and linguistics at the University of Washington, and went on to earn his master’s in English linguistics from University College London. His book of rephotography, Seattle Then and Now, was published in 2010. An updated version came out in 2015.