July 10, 1890 – Wyoming is admitted as the 44th U.S. state.
Several American Indian groups originally inhabited the region now known as Wyoming. The Crow, Arapaho, Lakota, and Shoshone were but a few of the original inhabitants encountered when white explorers first entered the region. What is now southwestern Wyoming became a part of the Spanish Empire and later Mexican territory of Alta California, until it was ceded to the United States in 1848 at the end of the Mexican-American War. French-Canadian trappers from Québec and Montréal ventured into the state in the late 18th century, leaving French toponyms such as Téton, La Ramie, etc. John Colter, a member of the Lewis and Clark Expedition, itself guided by French Canadian Toussaint Charbonneau and his young Shoshone wife, Sacagawea, first described the region in 1807. At the time, his reports of the Yellowstone area were considered to be fictional[by whom?]. Robert Stuart and a party of five men returning from Astoria discovered South Pass in 1812. The Oregon Trail later followed that route. In 1850, Jim Bridger located what is now known as Bridger Pass, which the Union Pacific Railroad used in 1868—as did Interstate 80, in ninety years' time. Bridger also explored Yellowstone and filed reports on the region that, like those of Colter, were largely regarded as tall tales at the time.
The region had acquired the name Wyoming by 1865, when Representative J. M. Ashley of Ohio introduced a bill to Congress to provide a "temporary government for the territory of Wyoming". The name Wyoming derives from the Munsee name xwé:wamənk, meaning "at the big river flat", but it was also named after the Wyoming Valley in Pennsylvania, made famous by the 1809 poem Gertrude of Wyoming by Thomas Campbell.[11][12]
After the Union Pacific Railroad had reached the town of Cheyenne in 1867, the region's population began to grow steadily, and the federal government established the Wyoming Territory on July 25, 1868.[13] Unlike mineral-rich Colorado, Wyoming lacked significant deposits of gold and silver, as well as Colorado's subsequent population boom. However, South Pass City did experience a short-lived boom after the Carissa Mine began producing gold in 1867.[14] Furthermore, copper was mined in some areas between the Sierra Madre Mountains and the Snowy Range near Grand Encampment.[15]
Once government-sponsored expeditions to the Yellowstone country began, reports by Colter and Bridger, previously believed to be apocryphal, were found to be true. This led to the creation of Yellowstone National Park, which became the world's first national park in 1872. Nearly all of Yellowstone National Park lies within the far northwestern borders of Wyoming.
http://en.wikipedia.org/wiki/Wyoming#History
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Just don't bring any of that anti union Rocky Mountain piss water (Coors).