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Fisheries Data: Endangered & Threatened Species' Boundaries

These data depict areas designated as boundaries for Distinct Population Segments (DPSs) or Evolutionarily Significant Units (ESUs) of species listed as threatened or endangered under the U.S. Endangered Species Act. These boundaries are not regulatory but may be useful for planning or visualization purposes.


Alaska | Northwest | Southwest | Northeast | Southeast | Pacific Islands


Alaska Region
Maps and data currently unavailable.


Northwest Region

  • Pacific Salmon and Steelhead
    Description: These datasets identify boundaries for 19 evolutionarily significant units or distinct population segments of Pacific salmon (Chinook, coho, chum, and sockeye) and steelhead in Washington, Oregon, and Idaho.
    » Metadata
    » Map
    » Data

    Chinook Salmon
    • Lower Columbia River
    • Puget Sound
    • Upper Columbia River Spring-run
    • Upper Willamette River
    • Snake River Fall-run
    • Snake River Spring/Summer-run

    Coho Salmon
    • Lower Columbia River
    • Oregon Coast
    • Southern Oregon and Northern California Coasts

    Chum Salmon
    • Columbia River
    • Hood Canal Summer-run

    Sockeye Salmon
    • Ozette Lake
    • Snake River

    Steelhead
    • Puget Sound
    • Upper Columbia River
    • Middle Columbia River
    • Lower Columbia River
    • Snake River Basin
    • Upper Willamette River

Southwest Region

  • Chinook & Coho Salmon and Steelhead
    Description: These datasets identify boundaries for 10 evolutionarily significant units or distinct population segments of Chinook and coho salmon and steelhead in California.
    » Metadata
    » Map
    » Data

    Chinook Salmon
    • California Coastal
    • Central Valley Spring-run
    • Sacramento River winter-run

    Coho Salmon
    • Central California Coast
    • Southern Oregon and Northern California Coasts

    Steelhead
    • Northern California
    • Central California Coast
    • South-central California Coast
    • Southern California
    • California Central Valley

Northeast Region

  • Atlantic Salmon, Gulf of Maine DPS
    Description: These datasets represent boundaries of the inland range of the listed species. One file provides the overall boundary of the DPS while the second file includes the internal boundaries of the U.S. Geological Survey HUC10 watersheds used in determining the DPS and critical habitat boundaries.
    » Metadata [xml]
    » Map
    » Data [zip]

Southeast Region
Maps and data currently unavailable.


Pacific Islands Region
Maps and data currently unavailable.


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