1. The Wyoming State Penitentiary was established on March 6, 1901. It was built in Rawlins and was one of the first institutions of its kind in the United States to have an execution chamber.

2. In 1924, Wyoming became the first state in the country to elect a female governor, Nellie Tayloe Ross. She took office on January 5, 1925, but her inauguration ceremony was held on March 6, which was also her birthday.

3. On March 6, 1872, President Ulysses S. Grant signed the Yellowstone National Park Protection Act into law. This act established Yellowstone as the first national park in the United States and the world.

4. The Wyoming Territorial Legislature passed a bill on March 6, 1869, establishing the University of Wyoming. The university opened its doors in 1887 and remains the only public, four-year institution of higher education in the state.

5. In 1890, Wyoming became the last state to join the Union. President Benjamin Harrison signed the statehood proclamation on July 10, but March 6 is considered Wyoming Statehood Day, as it marks the date when the state's constitution was approved by Congress.