During the Pleistocene and into the Holocene epochs, an alpine glacier originating from the southwest in the Stuart Range made its way to where the town is today. Leavenworth sits on the terminal moraine of that glacier and has many glacial erratics that originated 20 miles up the Icicle Valley near Mount Stuart.
Salmon Creek, Washington (Wikipedia) Salmon Creek is a census-designated place (CDP) in Clark County, Washington, United States. The population was 21,293 at the 2020 census.