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Northwestern Great Plains

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To check where a specific point lies, you can look it up in our Ecoregion Locator.

Map Legend & Subregion List

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NameColor on MapEPA Code‡
Missouri Plateau43a
Little Missouri Badlands43b
River Breaks43c
Forested Buttes43d
Sagebrush Steppe43e
Subhumid Pierre Shale Plains43f
Semiarid Pierre Shale Plains43g
White River Badlands43h
Keya Paha Tablelands43i
Moreau Prairie43j
Dense Clay Prairie43k
Missouri Breaks Woodland-Scrubland43l
Judith Basin Grassland43m
Montana Central Grasslands43n
Unglaciated Montana High Plains43o
Pine Scoria Hills43p
Mesic Dissected Plains43q
Niobrara River Breaks43r
Non-calcareous Foothill Grassland43s
Shield-Smith Valleys43t
Limy Foothill Grassland43u
Pryor-Bighorn Foothills43v
Powder River Basin43w
Casper Arch43x

† Status: ✓ = Complete ○ = Needs Image … = Incomplete ∅ = Stub Only

This code refers to the US EPA's Level 4 ecoregion codes for the continental U.S., see here.


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