1. On April 16, 1859, a group of prospectors discovered gold in the area that is now known as Colorado City. This event sparked the Colorado Gold Rush, which brought thousands of settlers to the region in the following years.

2. In 1883, the Colorado State Legislature passed a bill authorizing the establishment of the Colorado School of Mines in Golden, Colorado. The school opened its doors in 1874, and it continues to be a leading institution for mining and engineering education.

3. During the early 20th century, April 16 became known as "Emancipation Day" in Colorado, as it marked the anniversary of the signing of the Emancipation Proclamation by President Abraham Lincoln. This day was celebrated by the African American community in Denver with parades, picnics, and other events.

4. In 1936, a violent dust storm swept across the eastern plains of Colorado, causing widespread damage and earning the nickname "Black Sunday." The storm was a devastating reminder of the Dust Bowl era, during which severe drought and soil erosion affected much of the Great Plains region.

5. On April 16, 1975, the Denver Nuggets hosted the Indiana Pacers in the final game of the 1974-75 NBA season. The game was notable because it was played at McNichols Sports Arena, which had just opened a few weeks earlier. The Nuggets won the game 130-121, but they were eliminated from the playoffs in the first round.