1. In 1864, the Colorado Territory approved a bill for the establishment of a university in Boulder, which would later become the University of Colorado.

2. In 1907, the Denver & Rio Grande railroad company completed the construction of the Moffat Tunnel, a 6.2 mile-long railroad tunnel through the Continental Divide.

3. In 1939, the Pikes Peak Highway, a 19-mile road leading to the summit of Pikes Peak, officially opened for public use.

4. In 1968, astronaut John Glenn visited Colorado Springs to test a vehicle for the Gemini 8 mission, which would make him the oldest person ever to travel in space at the age of 77.

5. In 1983, Colorado's Arapahoe Basin became the first ski resort in the United States to operate a snow-making system, allowing for a longer ski season and more consistent snow conditions.