Chinook Indians. The Chinook were located on the north side of the Columbia River from its mouth to Grays Bay (not Grays Harbor), a distance of about 15 miles, and north along the seacoast to include Willapa or Shoalwater Bay. Ray (1938) makes a separate division to include the Shoalwater Chinook but it will be more convenient to treat them under one head. It is understood that they differed not at all in dialect.