Arriving at Guam on 6 July 1945, Mount Olympus sailed on for Manila Bay, colliding with the oiler along the way. The ship was escorted to San Pedro Bay on the Leyte Gulf, for repairs by the heavy repair ship . Then she continued to Manila, arriving on 3 August. After the close of hostilities in August 1945, Mount Olympus arrived at Tokyo Bay on 2 September with part of the U.S. 1st Cavalry Division. After months of moving occupation troops from the Philippines and other bases to ports in Japan and China, she left Shanghai on 28 May 1946, bound for San Diego, the Panama Canal, and New York Harbor, arriving on 7 July 1946.