After the war, "Oregon" was refitted in New York City before she was sent back to the Pacific, where she served as a guard ship for two years. She served for a year in the Philippines during the Philippine–American War and then spent a year in China at Wusong during the Boxer Rebellion until May 1901, when she was ordered back to the United States for an overhaul. In March 1903, "Oregon" returned to Asiatic waters and the ship remained in the Far East, returning only shortly before decommissioning in April 1906. "Oregon" was recommissioned in August 1911, but saw little activity and was officially placed on reserve status in 1914. On 2 January 1915, the ship was returned to full commission and sailed to San Francisco for the Panama–Pacific International Exposition. A year later, she was back to reserve status, only to be returned to full commission in April 1917 when the United States joined World War I. "Oregon" acted as one of the escorts for transport ships during the Siberian Intervention. In June 1919, she was decommissioned, but a month later she was temporarily recommissioned as the reviewing ship for President Woodrow Wilson during the arrival of the Pacific Fleet at Seattle. In October 1919, she was decommissioned for the final time. As a result of the Washington Naval Treaty, "Oregon" was declared "incapable of further warlike service" in January 1924. In June 1925, she was loaned to the State of Oregon, who used her as a floating monument and museum in Portland.