Prehistoric cultural affiliation(s) include Cayuse Phase dating back to 2999 BC.
Several famous people are associated with these Kittitas County historic places including John Shoudy and Dr. John Robbins.
Some of the country's most noteable architects helped create the Kittitas County places including Samuel Maclure, C.E. Price, Oren Hutchinson, Chi.,Milwkee,St.Pl. & Pacific RR Co., John Nash, Samuel B. Olmstead, Albert Nelson, State Dept of Hwys, Kittitas Railway & Power Co. and Ike Jones. Prominent architectural styles found in Kittitas Country are Bungalow/Craftsman, Colonial Revival and Queen Anne.