1. In 1890, Colorado officially became a state on October 21. This day marked the end of a long struggle for statehood by the people of Colorado.

2. On October 21, 1910, the Manitou & Pikes Peak Railway reached the summit of Pikes Peak for the first time. This historic achievement made Pikes Peak the highest mountain in the world to have a railway to the summit.

3. Denver's iconic Blue Bear sculpture was unveiled on October 21, 2005. The 40-foot-tall sculpture, officially known as "I See What You Mean," quickly became a beloved landmark in downtown Denver.

4. In 1979, the historic Stanley Hotel in Estes Park was added to the National Register of Historic Places on October 21. The hotel, which inspired Stephen King's novel "The Shining," is known for its haunted reputation and stunning mountain views.

5. On October 21, 2007, the Colorado Rockies made history by winning their first National League pennant. The team went on to face the Boston Red Sox in the World Series, but ultimately lost in four games. Despite the outcome, the Rockies' playoff run was a source of pride for Colorado baseball fans.