Interactive map of Puget Sound and the Salish Sea

Use our interactive map to determine if a geographic feature is within the boundaries of the Puget Sound or Salish Sea watersheds. The Puget Sound region includes the area within the United States while the Salish Sea region* encompasses the entire shaded area. Areas that influence circulation in the Salish Sea or eventually drain into the estuary are marked by broader boundaries.

Salish Sea and Puget Sound basins

Map sources: 

Shaded Salish Sea* and Puget Sound boundaries are courtesy of NOAA.

Broader watershed and circulation boundaries are courtesy of the Salish Sea Modeling Center. 

*Salish Sea boundaries within the shaded area do not include the entire watershed and were determined by mapmakers based on a combination of factors described here.