Watershed
According to Rich Ellison, Boeing Creek's watershed is 11.74 square miles (30.4 km2) large and includes 3.4 miles (5.5 km) of Puget Sound shoreline. The watershed is almost entirely within the city of Shoreline, reaching north nearly to the Snohomish County line. Its southern extent reaches slightly into the city of Seattle. Boeing Creek's watershed borders, to the west, the watersheds of McAleer Creek, Thornton Creek, and Lyons Creek. King County maps Boeing Creek's watershed slightly differently. According to King County the watershed is completely contained within the City of Shoreline.
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