1. Wyoming was officially admitted as the 44th state of the United States on September 16, 1890. President Benjamin Harrison signed the statehood proclamation, making Wyoming the first state to grant women the right to vote.

2. In 1906, a devastating wildfire known as the Great Fire of 1906 broke out in the Medicine Bow Mountains of Wyoming on September 16. The fire burned over 1 million acres of land, destroyed several small communities, and claimed the lives of at least 12 people.

3. Wyoming's Devils Tower National Monument was established on September 16, 1906, by President Theodore Roosevelt, making it the first national monument in the United States. The towering monolith is a sacred site for many Native American tribes and a popular rock-climbing destination.

4. Famous outlaw Butch Cassidy and his Wild Bunch gang robbed the Union Pacific Overland Flyer train near Wilcox, Wyoming, on September 16, 1899. The notorious gang made off with over $35,000 in cash and gold, making it one of their most lucrative heists.

5. The Wyoming State Fairgrounds, located in Douglas, officially opened on September 16, 1905. The fairgrounds have been a popular destination for over a century, hosting a variety of events, including the annual Wyoming State Fair.