Aerial photo mosaic of the Wilson and Kilchis Rivers, Tillamook basin, Oregon in 1939
The Tillamook Bay subbasins and Nehalem River basins encompass 1,369 and 2,207 respective 
square kilometers of northwestern Oregon and drain to the Pacific Ocean. The Tillamook, Trask, 
Wilson, Kilchis, and Miami Rivers flow into Tillamook Bay near the towns of Tillamook and Garibaldi. 
The Wilson and Trask River …