The Thunder Basin National Grassland is located in northeastern Wyoming in the Powder River Basin between the Big Horn Mountains and the Black Hills. The Grassland ranges in elevation from 3,600 to 5,
Thunder Basin National Grassland
Powder River Basin
Videos
The Powder River Basin is a geologic structural basin in southeast Montana and northeast Wyoming, about 120 miles east to west and 200 miles north to south, known for its extensive coal reserves. The
Powder River Basin and surrounding uplifts (US Geological Survey)
Northeast view of the mile wide Decker coal mine and the Tongue River in the Powder River Basin, southeastern Montana.