1. On April 13, 1887, the town of Durango was officially incorporated. Durango is still a popular tourist destination in southwest Colorado, known for its historic downtown and access to outdoor recreation such as hiking, skiing, and rafting.

2. In 1917, the Colorado Senate passed a bill prohibiting the teaching of German in schools during World War I. The bill was later overturned, but it highlights the anti-German sentiment that existed in Colorado and throughout the country during the war.

3. On April 13, 1942, President Franklin D. Roosevelt signed Executive Order 9066, which authorized the forced relocation of Japanese Americans to internment camps during World War II. Many Japanese Americans from Colorado were sent to camps in California and other states.

4. In 1960, the Colorado Rockies, a minor league baseball team, played their first game at Hi Corbett Field in Tucson, Arizona. The Rockies were the top farm team of the major league team of the same name, which later became the Colorado Rockies in 1993.

5. April 13, 1974, was the date of the "Super Outbreak," a series of violent tornadoes that swept across the United States, including Colorado. Twenty-two tornadoes were reported in Colorado that day, causing extensive damage and killing four people. The outbreak as a whole resulted in 148 tornadoes and over 300 fatalities.