the Columbia River behind the John Day Dam is called Lake Umatilla. Notable Umatillas Donald McKay – scout and leader of the Warm Springs Indians during the Modoc War Shoni Schimmel – WNBA player Acosia Red Elk – World Champion Jingle Dress Dancer, yoga instructor See also Kennewick Man Footnotes Further reading External links Confederated Tribes of the Umatilla Indian Reservation homepage Native American tribes in Oregon