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Level III and IV Ecoregions of the Continental United States

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For additional details about each Ecoregion level, including links to downloadable maps and GIS data files, click on one of the gray bars below.

Level III Ecoregions

Map of Level III Ecoregions of the Continental United States (select map for larger PDF version)Level III Ecoregions of the Continental United States (select map for larger PDF version)

Level III Ecoregions Downloads

(NOTE: maps and GIS files may differ. To make sure you are using the most current ecoregion data, download shapefiles of ecoregions)

GIS data (shapefiles, metadata and symbology):

Maps (PDF Format):

Ecoregion Descriptions (MSWord documents):

Level IV Ecoregions

Map of Level IV Ecoregions of the Conterminous United States (select map for larger PDF version)Level IV Ecoregions of the Conterminous United States (select map for larger PDF version)

(NOTE: maps and GIS files may differ. To make sure you are using the most current ecoregion data, download shapefiles of ecoregions)

GIS data (shapefiles, metadata and symbology):

Maps (PDF Format):