1. On January 31, 1863, the Idaho Territory was established. President Abraham Lincoln signed a congressional act creating the territory out of parts of Washington Territory and Dakota Territory.

2. In 1910, the town of Wallace, Idaho, suffered from one of the worst avalanches in U.S. history on January 31. The snowslide killed 90 people and caused extensive damage to the town.

3. On January 31, 1941, the Union Pacific Railroad officially opened the Union Pacific Railroad Depot in Idaho Falls. The depot is now a historic landmark that serves as a tourist attraction and event venue.

4. In 1971, the University of Idaho men's basketball team scored an impressive 80-76 victory over the nationally ranked Arizona State Sun Devils on January 31. The win helped boost the Vandals' confidence and contributed to their successful season that year.

5. On January 31, 1988, Idaho's Silver Mountain Resort opened to the public. The resort, located in Kellogg, offers skiing and snowboarding opportunities in the winter and mountain biking in the summer.