1. On October 22, 1917, the first airplane to cross the United States from coast to coast landed in Spokane, Washington after departing from New York on September 28th. This historic feat helped to pave the way for future transcontinental air travel.

2. In 1968, Idaho Governor Don Samuelson officially designated the square dance as the official state dance of Idaho on October 22nd, recognizing the dance's popularity and cultural significance in the state.

3. October 22, 1977, saw the first performance of the Idaho Dance Theatre, founded by Carl Rowe and Marla Hansen. The group has since become the largest dance company in Idaho, known for their innovative and dynamic performances.

4. On October 22, 1990, a 6.7 magnitude earthquake struck the Challis National Forest in central Idaho, causing significant damage in the area and shaking the entire state. The earthquake was the largest to hit Idaho in over 20 years.

5. In 2004, the Idaho Department of Parks and Recreation opened the Trail of the Coeur d'Alenes, a 72-mile scenic trail running through the heart of northern Idaho's Silver Valley. The trail, which was converted from a former railroad, has become a popular destination for hiking, biking, and wildlife viewing, attracting thousands of visitors each year.