A watershed is the land where rainfall or snowmelt drains into nearby streams, rivers, lakes, or Puget Sound. You can learn about flooding, how you can protect yourself from flooding, and flood-related projects on the following webpages.
The Snoqualmie-Skykomish watershed is in northeast King County. The Snoqualmie and Skykomish Rivers flow into the Snohomish River and out into Puget Sound. The watershed includes the Tolt River, Raging River and other tributaries.
The Sammamish watershed in east King County includes land that drains rainwater and snowmelt to Lake Sammamish, Bear Creek, Issaquah Creek, the Sammamish River and out into Lake Washington.
The Cedar River watershed is within the Lake Washington watershed. Madsen, Taylor, and Rock creeks flow into the Cedar River, which connects to Lake Washington.
The Green-Duwamish watershed is in southwest King County. The Green River begins in the Cascades and flows to its outlet in Elliott Bay via the Duwamish River.
The White River watershed is in south King County. About two-thirds of the watershed stretches extends into Pierce County.