The mines reopened in 1915 due to World War I's increased demand for the molybdenum and vanadium found in the area. When the war was over, the prices fell, and the mines closed again in 1919. Shortly thereafter, the Mammoth Mine property was purchased by Sam Houghton, who renamed both the mine and the town after his college mascot, the Princeton Tiger. When the price of gold increased in 1933, the town again grew in prosperity, and the new Tiger post office opened on March 1, 1939. It was as Tiger that the town reached its peak in the early 1950s. Soon after, the local mines, as well as the town of Tiger, had run their course, and the post office was discontinued on November 26, 1954.