1. On February 4, 1846, the Oregon Territory was created by the United States Congress. The territory included present-day Oregon, Washington, and parts of Idaho, Montana, and Wyoming.

2. In 1902, Oregon's first public library, the Portland Library Association, opened its doors to the public on February 4. The library had over 8,000 volumes and was housed in a room above a hardware store.

3. On February 4, 1936, Oregon's first ski area, Timberline Lodge, officially opened on Mount Hood. The lodge was built as part of President Franklin D. Roosevelt's New Deal program and is still in operation today.

4. The Oregon Zoo was founded on February 4, 1888, as the Portland Zoo. It was originally located in Washington Park and featured a collection of animals donated by a local pharmacist.

5. On February 4, 1982, the Tillamook Burn, a massive wildfire that burned over 355,000 acres of timberland in Oregon, was designated as a National Recreation Trail. The trail is now a popular hiking and mountain biking destination in the Tillamook State Forest.