Mount Baker departed Ulithi 3 June for overhaul at San Francisco, still in progress at the close of the year. She sailed in time to bring Christmas mail to occupation forces in the Philippines, then began the long task of bringing back to the United States unused ammunition that had been stockpiled at the various Pacific bases in anticipation of the planned invasion of Japan. She decommissioned in January 1947 and was placed in reserve at San Diego, Calif.