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Level III Ecoregions of Wyoming

Revised April 2000
National Health and Environmental Effects Research Laboratory
U.S. Environmental Protection Agency

level III ecoregions of Wyoming region 12   12. Snake River Basin
region 16   16. Montana Valley and Foothill Prairies
region 17   17. Middle Rockies
region 18   18. Wyoming Basin
region 19   19. Wasatch and Uinta Mountains
region 21   21. Southern Rockies
region 25   25. Western High Plains
region 43   43. Northwestern Great Plains