Snoqualmie Pass is a census-designated place in Kittitas County, Washington, United States. It includes the unincorporated community of Hyak. The population was 311 at the 2010 census. The CDP is named for the mountain pass that carries Interstate 90 across the Cascade Range, which itself is named for the Snoqualmie tribe, a Native American tribe indigenous to the Snoqualmie Valley located west of the pass.