1. The Leap Year Flood of 1936: On February 29, 1936, Colorado suffered from severe flooding due to heavy snowfall and intense rain. This event, known as the Leap Year Flood, caused significant damage to infrastructure and homes in southern Colorado, resulting in millions of dollars in damages.

2. Colorado's First State Parks: On February 29, 1960, Colorado established its first state parks. Eleven parks were created on that day, including Cherry Creek State Park and Chatfield State Park, which remain popular destinations for outdoor enthusiasts in the state.

3. Colorado's First Medal in the Winter Olympics: On February 29, 1964, Colorado native Bill Johnson won the state’s first medal in the Winter Olympics. He won a bronze medal in the men's downhill ski event at the Innsbruck Games.

4. Colorado's Women in the Military History: On February 29, 2012, Colorado native Brigadier General Tammy Smith became the first openly gay general officer in the U.S. military. She served as the Deputy Chief at the Army Reserve Human Capital Management Office in Virginia.

5. Colorado's Presidential Candidacy: On February 29, 2020, Colorado Senator Michael Bennet launched his presidential campaign for the 2020 election. Although he withdrew from the race in early 2020, Bennet's candidacy marked a significant moment in Colorado's political history.