1. On October 4, 1851, the Treaty of Table Rock was signed between representatives of the United States government and several Native American tribes in southern Oregon. The treaty established peace between the parties and defined the boundaries of tribal lands in the region.

2. In 1873, the Oregon State University (then known as the Corvallis Agricultural College) opened its doors to students for the first time on October 4. The college was established under the provisions of the 1868 Morrill Act, which provided federal funding for the establishment of colleges focused on agricultural and mechanical education.

3. In 1913, the Oregon State Capitol building in Salem was completed on October 4. The building features Neoclassical Revival architecture and is home to the offices of the governor and the Oregon State Legislature.

4. On October 4, 1920, the first public radio station in Oregon, KFDJ, began broadcasting in Portland. The station was owned and operated by the Portland Electric Power Company and later became part of the NBC radio network.

5. In 2002, the Oregon Historical Society opened a new museum in downtown Portland on October 4. The museum features interactive exhibits and displays that showcase the history of Oregon and its people, including Native American tribes, pioneers, and contemporary communities.