1. On June 24, 1858, the first Colorado newspaper, the Cherry Creek Pioneer, was published. It was a weekly newspaper that covered local news and events in the Cherry Creek Mining District.

2. The first legal hanging in Colorado took place on June 24, 1861, when a man named John Stoefel was executed for murdering his business partner. The hanging took place in Denver and was witnessed by a large crowd.

3. June 24, 1876, was the day of the infamous Battle of the Little Bighorn, also known as Custer's Last Stand. Although the battle took place in Montana, many of the soldiers who fought on the side of General George Custer were from Colorado.

4. On June 24, 1893, the first train arrived in the town of Durango, Colorado, marking the completion of the Denver and Rio Grande Railroad. The railroad played a crucial role in the growth and development of Colorado's mining industry.

5. The first-ever Colorado State Fair was held on June 24, 1879, in Pueblo. The fair has since become an annual tradition, attracting thousands of visitors and showcasing the best of Colorado agriculture, livestock, and entertainment.