| Kittitas County spans from Snoqualmie Pass in the Cascade mountain range, through the towns of Easton, Roslyn and Cle Elum, through the county seat in Ellensburg, and onto Vantage and the Columbia River, following the transportational artery of Interstate 90 (I-90). |  Kittitas County, Washington (Click map to see map of counties in WA) |   |