Statistics for occurrence #1 of “Great Salt Lake” in entry fremont-john-charles of Harper's Encyclopedia of United States History:

... of the government, the exploration of an overland route to the Pacific Ocean. He ascended the highest peak of the Wind River Mountains, which was afterwards named Fremont's Peak. He explored the Great Salt Lake region in 1843, and penetrated to the Pacific near the mouth of the Columbia River. In 1845 he explored the Sierra Nevada in California, and in 1846 became involved in hostilities with the Mexicans...
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