1. The Colorado Mineral Palace: On March 14, 1891, the Colorado Mineral Palace opened its doors in Pueblo. This massive building, made entirely of minerals found within the state, was a popular tourist attraction until it burned down in 1894.

2. The Ludlow Massacre: On March 14, 1914, one of the deadliest conflicts in labor history took place in Ludlow, Colorado. The Colorado National Guard, along with private security hired by the mining company, attacked and killed striking coal miners and their families.

3. The first Rocky Mountain National Park superintendent: On March 14, 1915, Enos Mills was appointed as the first superintendent of Rocky Mountain National Park. A naturalist and conservationist, Mills helped establish the park and played a crucial role in the National Park Service.

4. The Greeley UFO sighting: On March 14, 1950, several witnesses in Greeley, Colorado reported seeing a UFO in the sky. The incident was investigated by the US Air Force and is still considered one of the most credible UFO sightings in history.

5. The "Balloon Boy" hoax: On March 14, 2009, a family in Fort Collins, Colorado claimed that their son was trapped in a homemade helium balloon that had floated away. A massive search and rescue effort ensued, but the boy was later found safe at home. It was later revealed that the incident was a hoax perpetrated by the family.