1. Colorado becomes a state: July 2, 1876, marks an important milestone in Colorado's history as it officially became a state. Colorado was the 38th state to join the United States of America, and it was the only state to do so during the nation's centennial year.

2. Pikes Peak or Bust gold rush: In 1858, gold was discovered in the foothills of the Rocky Mountains near present-day Denver. This led to a gold rush known as "Pikes Peak or Bust." July 2, 1859, marked the arrival of several thousand prospectors in what is now Colorado. This event led to the establishment of numerous mining towns and the growth of Colorado's economy.

3. Tragedy at Ludlow: On July 2, 1913, a massacre occurred at the Ludlow coal mine in southern Colorado. The Colorado National Guard attacked striking miners and their families who were living in a tent colony. The attack resulted in the deaths of at least 19 people, including women and children.

4. Denver International Airport opens: July 2, 1995, marked the opening of Denver International Airport, one of the largest airports in the world. The airport covers 53 square miles and features unique features such as a tent-like roof and a 32-foot-tall statue of a blue mustang with glowing red eyes.

5. Colorado Rockies make history: On July 2, 2010, the Colorado Rockies made history by scoring 17 runs in one inning, the most runs scored in a single inning in Major League Baseball history. The Rockies beat the Arizona Diamondbacks 12-4, and the record-breaking inning featured 11 hits, two walks, and an error.