Black Hills near the Wyoming/Montana border

Traveling northward on WY 112 north of Hulett, we exit the Black Hills at their northern extent in northeastern corner of Wyoming. Then we pass into the seemingly endless prairie at the Montana border.

LEVEL IV Ecoregions:
Ecoregion 17a - Middle Rockies, Black Hills Foothills 0:00-2:03
Ecoregion 43g - Northwestern Great Plains, Semi-arid Pierre Shale Plains - 2:04-3:12
Ecoregion 43e - Northwestern Great Plains, Sagebrush Steppe - 3:13-3:28

Anyone interested in the EPA's well researched and documented ecosystems of North America, go to: https://www.epa.gov/eco-research/ecoregions