In 1910,Hillsboro politician Harry V. Gates bought the Crooked River Ranch property from local homesteaders and named it "Gates Ranch". The main ranch house was built in 1916 and is currently in use as a senior center. The property was named "Crooked River Ranch" as early as 1934. In 1961 the ranch was sold to the Thomas Bell family, who operated it as the Z-Z Cattle Co. for the next 10 years. In 1972 Crooked River Ranch was sold and developed as a recreational site. In 1980, the ranch's zoning changed from recreational to rural/residential. In 1992, the site was rezoned as a residential subdivision.
^ abFourteenth annual report of the Federal Power Commission, fiscal year ended June 30, 1934, with additional activities to December 1, 1934. Serial Set Vol. No. 9968, Session Vol. No.56; Report: H.Doc. 26. 1935-01-03. pp. 216–217.