1. In 1904, the first automobile race in Colorado was held in Pueblo. The race was won by J. J. Murphy, who drove a Peerless automobile.

2. On October 25, 1924, the city of Pueblo was hit by a devastating hailstorm. The hailstones were reportedly the size of baseballs and caused extensive damage to buildings and crops.

3. In 1946, the University of Colorado's Institute of Arctic and Alpine Research was founded. The institute is dedicated to the study of high-altitude environments and has conducted research in locations around the world.

4. On October 25, 1968, the Denver Nuggets played their first game as a member of the American Basketball Association. The team lost to the Pittsburgh Pipers, 113-111.

5. In 1971, the Colorado Rockies hockey team played their first home game at the McNichols Sports Arena in Denver. The team, which later became the New Jersey Devils, defeated the Toronto Maple Leafs, 5-2.