is a state in the mountain region of the Western United States. The state is the tenth largest by area, but the least populous and the second least densely populated of the 50 United States. Cheyenne
is the capital and most populous city of the US state of Wyoming a
("Red Hill City") is the second-largest city in Wyoming. Casper is nicknamed "The Oil City" and has a long history of oil boomtown and cowboy culture.
The Cheyenne River
referring to the Cheyenne people who once lived there, is a tributary of the Missouri River in the U.S. states of Wyoming and South Dakota. Yellowstone
Yellowstone National Park
is a national park located primarily in the U.S. state of Wyoming, although it also extends into Montana and Idaho