First White Man
Alexander Ross, a fur trader for John Jacob Astor, travels to the Kittitas Valley in search of horses. He is the first known white man to enter the valley.
July – Father Pandosy, Chirouse, and G. Blanchet establish Immaculate Conception, a Catholic mission, near Manastash Creek.
First Government Expedition
Lt. George B. McClellan leads the first government expedition into the Kittitas Valley. He was conducting a survey for construction of a railroad in “Nahcheez” and Snoqualmie passes.
Yakama Indian War
Cattlemen including Ben Snipes bring herds to graze in the Kittitas Valley
Ferguson County is created and includes much of modern Kittitas and Yakima Counties. County is soon disbanded.
Small Cabin Built
William (Bud) Wilson builds a small cabin on a creek (later known as Wilson Creek)
First accepted land survey performed.
Charles Spawn Move
Charles Splawn (brother of Andrew Jackson Splawn) moves to the valley at Taneum.