1. In 1858, the first official gold discovery was made in Colorado by George A. Jackson in what is now Idaho Springs. This discovery sparked the Pikes Peak Gold Rush and drew thousands of people to Colorado in search of riches.

2. On September 17, 1862, a group of Confederate soldiers led by Captain John R. Baylor captured the town of Mesilla, New Mexico. This was significant for Colorado because the event solidified Confederate control over most of the Southwest and threatened Colorado's mining industry.

3. In 1908, the Denver & Rio Grande Western Railroad completed the Moffat Tunnel, which passes through the Continental Divide and connects Denver to the Western Slope of Colorado. This allowed for easier transportation of goods, people, and resources between the eastern and western regions of the state.

4. On September 17, 1928, the first issue of the Denver Post was published. The newspaper would go on to become one of the largest in the region, covering news and events throughout Colorado.

5. In 1937, the Colorado State Fair was held in Pueblo. This annual event brings together farmers, ranchers, and communities from across the state to showcase their livestock, produce, and other goods. The Colorado State Fair continues to be a popular event to this day.