1. In 1858, William Green Russell and a group of prospectors discovered gold at the confluence of the South Platte River and Cherry Creek, which led to the Pike's Peak Gold Rush and the founding of Denver.

2. On May 27, 1878, one of Colorado's deadliest tornadoes occurred in the town of Windsor, killing 1 person and injuring 70 others.

3. The first transcontinental airmail delivery took place on May 27, 1919, when pilot Ray Miller flew from New York to San Francisco with a stop in Cheyenne, Wyoming.

4. In 1929, Colorado became the first state in the US to broadcast state-funded educational television programming.

5. On May 27, 2002, the Hayman Fire began and ultimately burned over 138,000 acres in the Pike National Forest, becoming the largest wildfire in Colorado's recorded history until it was surpassed by the Pine Gulch Fire in 2020.