1. On July 26, 1890, Idaho officially became the 43rd state of the United States of America. The state was created from what was then known as the Idaho Territory, which had been established in 1863 during the American Civil War.

2. In 1976, Idaho celebrated its centennial with a series of events and festivities throughout the state. Among the highlights of the celebration was a parade in downtown Boise that featured floats, horses, and marching bands from around the region.

3. On July 26, 1939, President Franklin D. Roosevelt dedicated the new Bonneville Dam on the Columbia River, located near the border between Oregon and Washington. The massive project, which had been under construction for nearly a decade, was designed to help provide hydroelectric power to the rapidly growing Pacific Northwest region.

4. In 1906, the Boise River experienced a devastating flood that caused extensive damage in the city of Boise and surrounding areas. The floodwaters reached a high of 21 feet, and thousands of people were forced to flee their homes. Despite the damage caused by the flood, it helped to spur the development of new flood control measures in the region.

5. On July 26, 1933, the famous dancer and choreographer Martha Graham made her debut performance at the Blaine County Community Theatre in Ketchum, Idaho. Graham was already a celebrated figure in the world of modern dance, and her appearance in Idaho helped to raise the profile of the state's performing arts scene.