1. The Completion of the Boise Greenbelt – On December 17, 1968, the final stretch of the Boise Greenbelt, a popular biking and walking trail, was completed. The trail is 25 miles long and winds through the city along the Boise River.

2. Idaho State Capitol Fire – On December 17, 1951, a devastating fire broke out in the Idaho State Capitol building. The fire destroyed much of the building, including the iconic dome, and caused millions of dollars in damage. The reconstruction of the State Capitol was not completed until 1970.

3. Micron Technology Founded – On December 17, 1978, Micron Technology, now one of the world's largest manufacturers of computer memory and storage, was founded in Boise, Idaho. The company has since grown to employ more than 40,000 people worldwide.

4. Sun Valley Resort Opens – On December 17, 1936, the famous Sun Valley Resort opened its doors in Ketchum, Idaho. The resort, which was originally designed as a destination for Hollywood's elite, has since become a popular ski resort and vacation spot.

5. Idaho Becomes a State – On December 17, 1890, President Benjamin Harrison signed the bill that admitted Idaho to the Union as the 43rd state. The state's name is thought to be derived from a Shoshone word meaning "gem of the mountains".