1. On April 22, 1886, the city of Salem, Oregon experienced a devastating fire that burned down over 300 buildings and caused $1.5 million in damage. The fire began in a paint store and quickly spread due to strong winds and wooden buildings.

2. April 22, 1970 marked the first celebration of Earth Day, a national event aimed at raising awareness and promoting conservation efforts for environmental protection. The event was founded by Senator Gaylord Nelson and is now observed in over 190 countries.

3. In 1914, on April 22, the Oregon Legislature passed a bill that established Crater Lake National Park as the fifth national park in the United States. Crater Lake is famous for its stunning blue color and is the deepest lake in the country, with a depth of 1,943 feet.

4. April 22, 1910 saw the opening of Timberline Lodge on the south slope of Mount Hood. The lodge was built as part of a Works Progress Administration (WPA) project during the Great Depression and is now a National Historic Landmark and popular ski resort.

5. On April 22, 1864, Oregonians voted to amend the state constitution to abolish slavery. While slavery was never widespread in Oregon, the state's original constitution had permitted it and the amendment served to officially outlaw the practice.