1. In 1878, construction began on Oregon's first lighthouse at Cape Blanco, located on the southern coast of the state. The lighthouse, which still stands today, was first lit on December 20 of that year.

2. In 1933, the Civilian Conservation Corps (CCC) opened its first camp in Oregon, located in the Siskiyou National Forest. The CCC aimed to employ young men in conservation work, such as building trails and planting trees, while also improving their physical and mental health.

3. On June 11, 1955, a fire broke out at the Rogue River National Forest, burning over 7,000 acres of land. The fire was caused by lightning and took over a week to fully extinguish.

4. In 1971, the Oregon Department of Fish and Wildlife began a program to reintroduce bighorn sheep into the state. The program was successful, leading to the population of bighorn sheep in Oregon steadily increasing over the years.

5. In 2003, the Oregon House of Representatives passed a bill legalizing same-sex marriage. However, the bill failed to pass in the state senate, and it wasn't until 2014 that same-sex marriage was legalized in Oregon through a federal court ruling.