Ecoregions

Ecoregions 101

What would happen if, in the interest of providing large-scale context for setting conservation priorities, we removed state boundaries from our maps? For conservation practitioners, the answer might be ecoregions, which group distinctive plants, animals, and natural communities based on regional patterns of climate, landform, soil, and hydrology.

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Featured Ecoregions

  • Middle Rockies - Blue Mountains

    The Middle Rockies - Blue Mountains Ecoregion represents a large mass of rugged mountains and intermontane valleys covering major portions of Oregon, Idaho, and Montana, and a small part of Washington.

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  • Lower New England-Northern Piedmont

    Stretching from southern Maine and New Hampshire through western Massachusetts and Connecticut, Vermont, and eastern New York, the Lower New England-Northern Piedmont includes, all told, portions of 12 states -- and the District of Columbia.

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  • Mid-Atlantic Coastal Plain

    The Mid-Atlantic Coastal Plain occupies 26 million acres east of the fall line between the Piedmont and Atlantic Coastal Plain, south of the James River in Virginia and north of Charleston Harbor in South Carolina.

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  • Florida Peninsula

    Although it is fragmented by three Interstate highways and the prominent, sprawling metropolitan areas of Orlando and Tampa, the Florida Peninsula also features several large managed areas that form a basis for natural resource conservation.

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  • West Cascades

    The West Cascades Ecoregion extends west from the Cascade Crest to the Puget Sound and Willamette Valley lowlands and from Snoqualmie Pass south across the Columbia Gorge to the Klamath Mountains in southwest Oregon, almost to the California border.

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Explore More Ecoregions

Go to the Map

Use the interactive map to zoom smoothly from a national view to state and local perspectives anywhere across the country.

Go Straight to Your State

Learn about conservation and open space in your state.

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