1. In 1890, the Denver and Rio Grande Western Railroad completed its line connecting Denver to Salt Lake City, Utah, which passed through a number of Colorado cities and towns, including Pueblo and Grand Junction. This new transportation network helped to spur economic growth and development throughout the state.

2. On November 29, 1912, the Colorado Fuel and Iron Company, which owned numerous coal mines and steel mills in the state, announced a new policy that would require all workers to sign a "yellow dog" contract, pledging not to join a union. This policy led to widespread labor unrest and eventually culminated in the infamous Ludlow Massacre of 1914, in which dozens of striking miners and their families were killed by the Colorado National Guard.

3. In 1961, the Central City Opera House in Central City, Colorado, reopened after a lengthy restoration process. The building, which had originally opened in 1878 and had hosted numerous famous performers over the years, had fallen into disrepair in the mid-twentieth century before being saved by a community-wide effort.

4. On November 29, 1979, the Vail ski resort in Colorado introduced a new type of ski instruction program called "Ski with the Masters." This program allowed visitors to ski alongside and learn from some of the most legendary skiers in the world, including Jean-Claude Killy and Stein Eriksen.

5. In 2016, Colorado became the first state in the country to allow "right to die" legislation, which allows terminally ill patients to obtain medication that they can use to end their own lives. The law went into effect on December 16, 2016, after being passed by voters in a ballot initiative earlier that year.