1. Idaho's first gold rush began on June 3, 1862. A group of prospectors led by George Grimes discovered gold along the Clearwater River, setting off a rush of fortune-seekers to the region.

2. On June 3, 1902, a volcanic eruption began at Mount Pelée in the Caribbean, devastating the city of Saint-Pierre on the island of Martinique. Among the casualties was Fredrick Gooding, an Idahoan who was serving as the U.S. consul in Saint-Pierre at the time of the disaster.

3. Idaho's first airplane flight took place on June 3, 1911. Aviator Calbraith Perry Rodgers made a stop in Boise as part of his historic cross-country flight from New York to California.

4. On June 3, 1935, Idaho Governor Barzilla Clark signed a bill legalizing commercial gambling in the state. The measure allowed for slot machines and other forms of wagering, but prohibited table games like blackjack and roulette.

5. Idaho's longest-serving governor, Cecil Andrus, died on June 3, 2017 at age 85. Andrus, who served four terms as governor between 1971 and 1995, was a champion of environmental conservation and a prominent figure in Democratic politics on the national stage.