1. On June 13, 1977, the deadliest tornado in Colorado history struck the city of Denver. The F3-rated tornado killed two people and caused extensive damage throughout the city's northeast side.

2. In 1884, on June 13th, the cornerstone for the Colorado State Capitol Building was laid in Denver. The building took 13 years to construct and was completed in 1907.

3. The town of Aguilar, Colorado was founded on June 13, 1894, by coal miners seeking work in the area's coal mines. The town grew quickly and became an important center for mining and transportation.

4. On June 13, 1961, the United States Air Force Academy officially opened its doors in Colorado Springs. The academy is known for its rigorous academic and physical training programs, as well as its stunning campus architecture.

5. In 1930, on June 13th, the city of Pueblo was rocked by a deadly earthquake that caused widespread damage and killed two people. The quake had a magnitude of 6.1 and was felt throughout southern Colorado and neighboring states.